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Yes, a voltage variable potentiometer (also known as a voltage divider) is still wired in series with the circuit. In this configuration, the potentiometer is used to divide the voltage between its two output terminals, which are connected to the rest of the circuit. By adjusting the position of the potentiometer's wiper, the voltage output from the potentiometer can be varied, allowing for precise control of the voltage supplied to the circuit. It's important to note that in this configuration, the potentiometer's resistance value should be chosen based on the current requirements of the circuit, and the maximum voltage that will be present across the potentiometer. Exceeding either of these limits can cause the potentiometer to overheat or fail.
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I watched a video on this, right before this one. While, not a bad video, it can’t even begin to compete with yours. The “inner-workings” graphic you used, really helped me to get a fundamental understanding of what’s going on, and how to utilize each pin of the potentiometer, for whatever end result I’m seeking for my circuits behaviour.’THANKS
I'm just getting started on my electronics journey and your explaination is perfect. Thank you for making this video and I will look forward to checking out your other videos as i learn
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I have a question, for the example at 3:10 ..... why does the left terminal have both black wires? Couldn't the left terminal not be used at all and go straight from the negative battery to the motor?
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal. For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
🎯 Key Takeaways for quick navigation: 00:03 🧪 Potentiometer is a mechanically driven analog device used in electronics projects. 00:31 🔄 Potentiometer is a variable resistor that can easily change resistance by turning a knob. 01:01 🔌 Potentiometer has three terminals: two fixed and one variable, forming an arc of a circle. 01:30 🔗 The middle terminal (wiper) moves across resistive element, altering electrical contact. 01:58 🔍 Multimeter helps measure potentiometer resistance; wiper's position affects value. 02:27 🔧 Wiper position changes resistance; multimeter probes measure resistance accordingly. 03:21 💡 Potentiometer used as variable resistor for LED brightness control. 04:18 ⚙️ Potentiometer acts as voltage divider for motor speed control. 05:15 📚 Understanding the basic concepts of potentiometers for electronic projects.
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I'm new to electronics so forgive me for my stupid question. Please help me understand? At 4:46 you said: "If we adjust the wiper in a way that introduces high resistance, more voltage will drive to the motor, resulting in turning the DC motor faster." The motor IS running faster as you said BUT at this point the negative terminal on the battery is connected directtly to one terminal on the motor while the positive terminal from the battery takes the shortest path trhough the POT going straight via the wiper to the other terminal on the motror. Isn't this the LEAST resistance for the current? Why do you say the opposite of what seems to he happening?
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
First off electrons flow from negative to positive pole. imagine it was a water driven and as the resistance increased the pipe gets smaller, less water flows and visa versa. As you increase the resistance to the wiper it decreases the flow of electrons (water) so the motor turns slower.
Actually a good question, and I was confused for a bit here too. Here is the clarification: When he says that he introduces “higher resistance”, he is talking about introducing higher resistance between positive and negative battery terminals (entire resistance of arc), therefore, resulting in more voltage to the motor because that is now the path of least resistance (positive terminal and wiper). Hope that helped.
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I don't quite get the "3 wire configuration" example at 5:04, wouldn't a 2 wire setup like the previous LED example give the same outcome of adjusting the motor speed, what's the difference and advantage of controlling the motor this way? Thank you for the video, it really helped me understand how a potentiometer works!
Not the author, and not an expert, but I decided to kinda look into this... This is all from my understanding and interpretation, so take it with a slight grain of salt and if I'm wrong, hopefully someone can correct me! The 2-wire setup will simply add resistence in-line, effectively creating heat and noise on the line. It's already succeptible to some noise with the 3rd wire not part of the ciruit anyway, but resistence adds noise. You can think of it like adding more resisters in series the more you turn it up, or replacing the existing resistor with a bigger and bigger one. No matter what, you are sending electrons through the entire series of resistors. This in effect increases resistence/impedance to drop Voltage, but Current will remain consistent through the circuit (same is true for resistors in series). When in a 3-wire configuration, you create a complete circuit eliminating noise or any failure in the pot itself (ie, break in the wiper vs track, etc), as well as use it as a voltage divider. The last part *was* stated in the video, but it didn't really explain what that means and why it matters to the motor condition versus an LED condition. A voltage divider does as it says, dividing the voltage, by actually cutting in between "2 resistors" in the circuit (in this case the left vs right side of the track between the wiper) and getting the voltage through the circuit there. This in turn gives us a better fractional value and step in the voltage output in our circuit. In addition, it also shares the load of the resistance of the circuit to the entire track (or 2 resistors in a proper voltage divider) allowing greater effeciency. Again, this is my understanding/interpretation of the math/logic, feel free to correct me if I'm wrong anywhere!
Thank you so much for your feedback! 😊 I'm glad you found the video helpful! 🎉 I appreciate your suggestion about including both rotary and linear potentiometers. Those are important distinctions, and I'll definitely consider adding explanations for them in future videos. 🌟 Rotary potentiometers are commonly used for adjusting volume or light intensity, while linear ones are more often used in applications like position sensing or level control. Thanks again for your input! If you found the video useful, feel free to share it, and stay tuned for more content. Let’s keep learning together! 🚀📚✨
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Couldn't you have achieved the same thing with the motor by using the first configuration? Only use 2 pins from the potentiometer and if you want to increase the speed of the motor just decrease the potentiometer resistance, and if you want to decrease the spin then add more resistance. I fail to see how using the third pin is useful for adjusting the speed when you can just use 2 pins. Can someone explain please
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal. For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
The difference is subtle. If you use all the 3 pins, you are employing not a variable resistor, but a voltage divider (see voltage divider in the internet to know more). In this case, the whole voltage of, say, a battery, is supplied to the whole device (suppose 6V). The DC motor is connected to the wiper and one of the legs of the potentiometer. The resistance of the part NOT connected to the DC motor determines the fall of potential, so if that resistance is low, the drop of voltage will be low and more voltage will remain for the part connected to the DC motor. This results in the fact that the more resistance is dedicated to the part of the DC motor, the more power it gets. It is a little bit brainy but if you follow the reasoning you soon well realize that it is really that way.
A voltage divider allows you to take a voltage and produce a lower voltage. They typically comprise a couple of fixed resistors. By using a potentiometer you can make that output voltage variable. Using a potentiometer in a 2 pin arrangement gives you a variable resistor, not a voltage divider. It is just a resistor which is changeable. And a resistor sets the current. A changing resistor allows you to change the current. So it all depends on what you are trying to do, what you actually need for your application, do you want a fixed or variable voltage: => voltage divider or potentiometer, or do you want to set a current to a desired magnitude or changeable magnitude: => resistor or potentiometer using two pins.
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Note: Never exceed the current through the potentiometer's rating or "Wattage" For Higher currents use a transistor [BJT or Mosfet] to control the load with the Pot controlling the transistor.
Thank you for the comment! You are absolutely correct. It is important to ensure that the current flowing through the potentiometer does not exceed its wattage rating. Exceeding the wattage rating can cause the potentiometer to overheat and even burn out. Using a transistor such as a BJT or Mosfet to control the load with the potentiometer controlling the transistor is a great way to ensure that the current through the potentiometer stays within its rated limit. This configuration is commonly known as a voltage divider circuit and is a widely used technique in electronics. Thanks again for the helpful comment!
That is very good info, clearly explained. But, for audiophiles, it would be great to know the effect on voltage & amperage, in each case, when the same identical potentiometer is used as a tone vs a volume control. From this video, and my knowledge that a volume control is a voltage divider...can I presume that tone control is varying amperage along with resistance? And, if so, what is the science between variations in resistance & amperage on the dominant tones or resonant peak of an audio signal???
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More information would be appreciated in understanding how the three prong set up is used as a voltage divider. does the circuit require a diode to the back wire to direct current through the potentiometer? would it not just bypass the potentiometer in the circuit? And if the current flow doesn't bypass the potentiometer doesn't that mean the current is flowing through the entire resistive strip to connect the circuit from the negative and positive terminals of the pot?
You're welcome! We are glad that you found the information useful. Adding a potentiometer to your emergency light project can be a great idea, especially if you want to adjust the brightness of the lights. With a 10k potentiometer, you should have plenty of range to adjust the brightness to your desired level. Good luck with your project! 😉
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
It depends on how the potentiometer is used. If you use it in a 2 pin configuration then you have a variable resistance and as the resistance increases the current through it will lower. If you use it in a 3 pin configuration, you are creating a potential divider (you will need to research yourself the theory of operation and the math behind it). Here the output is a voltage (not a current) across the resistance between one of outer pins and the middle wiper pin. Ohms Law says: V=IR, increase the resistance for a given value of current and the voltage across that resistance increases. So when used as a potential divider, and the output is across a variable resistance in the potentiometer, then as that resistance increases, the output voltage increases.
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In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
Thank you so much! 😊 I’m thrilled you liked the explanation! 🌟 If you found it helpful, feel free to share it with others-let’s keep learning and growing together! 🚀📚✨
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Thanks for the enlightenment, but is it safe to use this the same method for a dc 12v motor with 50k potentiometer? Please do it reply, thank you. From Nigeria
Yes, it should be safe, as long as the motor and the potentiometer are rated for the same or higher voltage than the battery. However, using a 50k potentiometer may not be the most appropriate for controlling the speed of a 12-volt DC motor because it may not provide enough resolution or precision to accurately control the motor speed.
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@@Automatedosure. This response is a bit late but yes I will definitely share this video to many of my friends so that it grows ur channel cause I think I deserve more subs.
For most audio volume controls, the 2-wire potentiometer should be enough. It will allow you to adjust the audio signal's amplitude without needing the extra complexity of a 3-wire setup. 😊 If you're setting up a circuit for a more advanced audio system or specific equipment, you may want to consider other factors, but for basic usage, the 2-wire is perfectly fine! 🎶
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Thank you for the explanation! However, I don't understand the voltage divider part. When the voltage which passes through the motor is changed by the potentiometer, will the current change too?
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Great video! However there is one part that isn't clear to me. Please tell me if I understand this part correctly. The resistance in a potentiometer depends on the length of the resistance element. When you adjust the knob on a potentiometer, the wiper either shortens or lengthens the element. Therefore, a longer element will have more resistance, while a shorter element will have less resistance. For instance, in volume control, the longer the resistance element when you turn it down, the lower the volume and the shorter the element when you turn it up, the higher the volume. As someone who had no prior knowledge of electronics, I thought the resistance element inside the pot had different points of resistance as opposed to the wiper actually shortening and lengthening the resistance element.
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hi, very interesting your explanation, it gonna help on my project, i have just one question before buy it, i have an mobility scooter, is my project now. i want make sure that i'll replace the original potentiometer which is (TSR 24KN resistanceResistance. Like 200k or 50k. Looking forward to hear from you. Appreciate
The TSR 24KN potentiometer has a nominal resistance of 200kΩ. However, it is possible that your scooter's control system may have been designed to work with a potentiometer of a different resistance value. To ensure compatibility and avoid potential damage to your scooter's control system, you should refer to the manufacturer's documentation to determine the correct replacement potentiometer for your mobility scooter.
at 4:43, the ( + ) and the ( - ) of the battery are technically connected to each other and form a closed circuit, won't this overheat the battery and damage it ??????🤔🤔🤔
The + and - terminals of the battery are indeed connected to each other in a closed circuit when connected to the potentiometer and motor in a voltage divider configuration. However, this does not necessarily lead to overheating or damage to the battery. In a voltage divider circuit, the current flowing through the circuit is determined by the total resistance of the circuit and the applied voltage. The potentiometer and motor act as resistors in the circuit, and the resistance of the potentiometer can be adjusted to control the amount of current flowing through the circuit. As long as the potentiometer is properly adjusted to limit the amount of current flowing through the circuit, the battery should not overheat or be damaged. It is important to choose a potentiometer with a suitable power rating and to calculate the appropriate resistance values to ensure safe operation of the circuit.
is that correct high resistance allows more voltage to the motor and low resistance on the wiper decreases the voltage at motor . Surely increasing the resistance drops the voltage at the motor due to voltage drop
Hi, I have followed all the instructions as in the video, I am using a 100k potentiometer and a 1 to 6 volt mini dynamo, but why is the Potassio emitting smoke, please give me instructions bro
I have a question about the 2 wire configuration with the led. If I connect the cable to the 3 pin(negative) and would turn it counterclockwise that the resistance increases and the led becomes weaker and if I turn it clockwise it gets brighter? so the exact opposite as mentioned in the video, thanks for replying😊
Hello. I have an interesting case. What if I have a variable resistance load (500 ohms-7000 ohms). I want to increase the voltage or force a current amount across it to generate controllable heat. How can I achieve this result with a power supply having an output of 0-30V and 0-10A? I appreciate your help
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I need help. I have a 750 Watt incandescent light bulb that I want to operate adjustable between 0 and 100 watts. I’m currently using a conventional dimmer switch and the switch and bulb are humming-hence, I’m looking at possibly using a potentiometer. IF a potentiometer will work for this application, how do I ‘size’ it? It’s running on a 120vac 60Hz supply. Thank you
How would this thing work on a lathe motor whereby you starve the motor of current, to slow the speed of the motor, then introduce, a heavy load to it. Will that burn the motor out in short order? And how reliable are these units per-se, are they themselves prone to failing? Thanks.
When it comes to controlling the speed of a motor, especially in applications like a lathe where heavy loads are involved, it is important to consider the motor's specifications and limitations. While a potentiometer-based voltage divider method can be used for speed control, it may not be the most suitable or reliable method for high-power applications like lathes. In scenarios where you want to slow down the motor by starving it of current and then introduce a heavy load, it can lead to increased stress and strain on the motor. This can potentially result in overheating, reduced efficiency, and even motor failure if the motor is not designed to handle such loads. For heavy-duty applications like lathes, it is recommended to use motor control techniques specifically designed for high-power and variable-speed operations. This typically involves using motor controllers, motor drivers, or specialized speed control systems that can handle the power and current requirements of the motor while providing better control and protection mechanisms. Regarding the reliability of these control units, it depends on the quality of the components, the design of the circuit, and the operating conditions. While potentiometers themselves are generally reliable, other components in the control circuit, such as transistors or motor drivers, may be more prone to failure if not properly selected or protected.
Can you explain to me how to select the value of potentiometer such that when I have a supply voltage of 9 volts, and I draw 50 milliamps of current, the voltage doesn't drop by more than 0.1 volt?
Indeed, selecting the appropriate potentiometer value can be a bit tricky. To answer your question, you'll need to calculate the resistance value of the potentiometer based on the voltage drop and current draw specifications. You can use Ohm's law (V = IR) to solve for the resistance value. Resistance value = 0.1 / 0.05 = 2 ohms. However, keep in mind that potentiometers have a limited power rating, so you should also make sure that the potentiometer can handle the current draw without overheating or exceeding its power rating.
Yes. To do this, you will need a potentiometer with the same resistance as the speaker. You can find the resistance of your speaker by looking at its specifications or by measuring it with a multimeter. Once you have a potentiometer, you will need to connect it in series with the speaker. To do this, connect one end of the potentiometer to the positive terminal of the speaker and the other end of the potentiometer to the positive terminal of the DVD component. Connect the negative terminal of the speaker to the negative terminal of the DVD component. Once the potentiometer is connected, you can adjust the volume of the speaker by turning the potentiometer knob. Turning the knob clockwise will increase the volume, and turning the knob counterclockwise will decrease the volume.
But brother how can I determine that which configuration I have to use ? For example last week we did in laboratory common source amplifier experiment.
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Of course! 👍 You can measure the potentiometer's resistance on a PCB even if other components are already installed. ⚡ Make sure your multimeter is set to ohm mode and connect the probes to the potentiometer's terminals. If possible, take the measurement while the circuit is powered off for more accurate results. 🔧📏 Hope this helps! 😊
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Excellent video. Well done.
Thanks for your precious support 😉
For the voltage variable one, is it still wired in series?
Yes, a voltage variable potentiometer (also known as a voltage divider) is still wired in series with the circuit. In this configuration, the potentiometer is used to divide the voltage between its two output terminals, which are connected to the rest of the circuit.
By adjusting the position of the potentiometer's wiper, the voltage output from the potentiometer can be varied, allowing for precise control of the voltage supplied to the circuit.
It's important to note that in this configuration, the potentiometer's resistance value should be chosen based on the current requirements of the circuit, and the maximum voltage that will be present across the potentiometer. Exceeding either of these limits can cause the potentiometer to overheat or fail.
Thank you for the video. i plan to create some videos for school students. may i know what software you used in producing this video?
That's all I wanted to know .
Precise, straight forward, no nonsense
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Same here... You'd be surprised at how many videos I have watched...
This is the best video I’ve ever seen on any electronic component, it’s so precise, quick, and intuitive.
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That's exatcly what I wanted to know, in a short time period all necessary information given, two thumbs up!! 👍👍
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yes
I watched a video on this, right before this one.
While, not a bad video, it can’t even begin to compete with yours. The “inner-workings” graphic you used, really helped me to get a fundamental understanding of what’s going on, and how to utilize each pin of the potentiometer, for whatever end result I’m seeking for my circuits behaviour.’THANKS
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I'm just getting started on my electronics journey and your explaination is perfect. Thank you for making this video and I will look forward to checking out your other videos as i learn
From your tone, it seems that we are compatriots. It was great and good luck🌹
Thank you for your comment! We are glad you enjoyed the video and it's great to hear that we may share a common background. Best of luck to you as well! 🌹
I have a question, for the example at 3:10 ..... why does the left terminal have both black wires? Couldn't the left terminal not be used at all and go straight from the negative battery to the motor?
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal.
For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
Perfectly clear video. I had an aha moment during you explanation. Now potentiometers make sense. Thank you.
🎯 Key Takeaways for quick navigation:
00:03 🧪 Potentiometer is a mechanically driven analog device used in electronics projects.
00:31 🔄 Potentiometer is a variable resistor that can easily change resistance by turning a knob.
01:01 🔌 Potentiometer has three terminals: two fixed and one variable, forming an arc of a circle.
01:30 🔗 The middle terminal (wiper) moves across resistive element, altering electrical contact.
01:58 🔍 Multimeter helps measure potentiometer resistance; wiper's position affects value.
02:27 🔧 Wiper position changes resistance; multimeter probes measure resistance accordingly.
03:21 💡 Potentiometer used as variable resistor for LED brightness control.
04:18 ⚙️ Potentiometer acts as voltage divider for motor speed control.
05:15 📚 Understanding the basic concepts of potentiometers for electronic projects.
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Lowbrow question
Controlling a LED. Input is 30v ... 1k pot with give me .03 increment of change (0-30volt amp)?
I'm new to electronics so forgive me for my stupid question. Please help me understand? At 4:46 you said: "If we adjust the wiper in a way that introduces high resistance, more voltage will drive to the motor, resulting in turning the DC motor faster." The motor IS running faster as you said BUT at this point the negative terminal on the battery is connected directtly to one terminal on the motor while the positive terminal from the battery takes the shortest path trhough the POT going straight via the wiper to the other terminal on the motror. Isn't this the LEAST resistance for the current? Why do you say the opposite of what seems to he happening?
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
Exactly my question
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
First off electrons flow from negative to positive pole. imagine it was a water driven and as the resistance increased the pipe gets smaller, less water flows and visa versa.
As you increase the resistance to the wiper it decreases the flow of electrons (water) so the motor turns slower.
Actually a good question, and I was confused for a bit here too. Here is the clarification: When he says that he introduces “higher resistance”, he is talking about introducing higher resistance between positive and negative battery terminals (entire resistance of arc), therefore, resulting in more voltage to the motor because that is now the path of least resistance (positive terminal and wiper). Hope that helped.
Thank you for this guide! Very useful from light dimmers to amplifiers. Greetings from Philippines.
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This was really helpful, thank you
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Thank you so much Sir ❤, it's very helpful video to beginning of Potentiometer user
You're very welcome! ❤ I'm so glad the video was helpful, especially for those just starting with potentiometers! 😊 It’s great to hear it’s making a difference. If you think others could benefit from it, feel free to share the video with them! Let’s keep spreading the knowledge and growing together! 🚀📚💡
Excellent explanation on how a volume pot works, thank you.
Great video. I learnt all I need to know about potentiometers in just as few minutes
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Great way to explain a circuit. Thank you this will help me a lot with my railroad projects.....Cheers U.K. modeler
Glad it helped. We wish you the best of luck with your upcoming projects 😉
Great job, well explained to the point! MarkMannM2
This video is a sample of "Perfection"!
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Very well explained. Thank you. Peace
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Excellent video, thank you
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I usually don't leave a comment however this a exceptions. i loved the video. Thank you
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That is exactly I wanted to to know.
You crystal clearly, and neatly explained it, thank you so much ! 💯
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Excellent explenation even for me! Hi from Ukraine! Thank you so much!
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it couldn’t be better in all aspects.
thanks.
Receiving comments like this is like a fuel for us to produce more informative video 🙃
Thanks, i really needed this Video as a beginner electrician, thumbs up 👍
Glad it helped 😉
@@Automatedo can you please upload a video for a beginner?
Great explanation sir, now i am getting the feel and imagination of it. Thank you sir
Glad to hear that 😉
I don't quite get the "3 wire configuration" example at 5:04, wouldn't a 2 wire setup like the previous LED example give the same outcome of adjusting the motor speed, what's the difference and advantage of controlling the motor this way?
Thank you for the video, it really helped me understand how a potentiometer works!
Not the author, and not an expert, but I decided to kinda look into this...
This is all from my understanding and interpretation, so take it with a slight grain of salt and if I'm wrong, hopefully someone can correct me!
The 2-wire setup will simply add resistence in-line, effectively creating heat and noise on the line. It's already succeptible to some noise with the 3rd wire not part of the ciruit anyway, but resistence adds noise. You can think of it like adding more resisters in series the more you turn it up, or replacing the existing resistor with a bigger and bigger one. No matter what, you are sending electrons through the entire series of resistors. This in effect increases resistence/impedance to drop Voltage, but Current will remain consistent through the circuit (same is true for resistors in series).
When in a 3-wire configuration, you create a complete circuit eliminating noise or any failure in the pot itself (ie, break in the wiper vs track, etc), as well as use it as a voltage divider. The last part *was* stated in the video, but it didn't really explain what that means and why it matters to the motor condition versus an LED condition. A voltage divider does as it says, dividing the voltage, by actually cutting in between "2 resistors" in the circuit (in this case the left vs right side of the track between the wiper) and getting the voltage through the circuit there. This in turn gives us a better fractional value and step in the voltage output in our circuit. In addition, it also shares the load of the resistance of the circuit to the entire track (or 2 resistors in a proper voltage divider) allowing greater effeciency.
Again, this is my understanding/interpretation of the math/logic, feel free to correct me if I'm wrong anywhere!
@@CodexHere very nicely explained!
Clean, Thanks.... It would have been even more better If it had got rotary and linear ones' explanation.
Thank you so much for your feedback! 😊 I'm glad you found the video helpful! 🎉
I appreciate your suggestion about including both rotary and linear potentiometers. Those are important distinctions, and I'll definitely consider adding explanations for them in future videos. 🌟 Rotary potentiometers are commonly used for adjusting volume or light intensity, while linear ones are more often used in applications like position sensing or level control.
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Wow! This answer is what I'm looking for! Thanks
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Excellent explanation ❤
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Couldn't you have achieved the same thing with the motor by using the first configuration? Only use 2 pins from the potentiometer and if you want to increase the speed of the motor just decrease the potentiometer resistance, and if you want to decrease the spin then add more resistance. I fail to see how using the third pin is useful for adjusting the speed when you can just use 2 pins. Can someone explain please
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal.
For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
The difference is subtle. If you use all the 3 pins, you are employing not a variable resistor, but a voltage divider (see voltage divider in the internet to know more). In this case, the whole voltage of, say, a battery, is supplied to the whole device (suppose 6V). The DC motor is connected to the wiper and one of the legs of the potentiometer. The resistance of the part NOT connected to the DC motor determines the fall of potential, so if that resistance is low, the drop of voltage will be low and more voltage will remain for the part connected to the DC motor. This results in the fact that the more resistance is dedicated to the part of the DC motor, the more power it gets. It is a little bit brainy but if you follow the reasoning you soon well realize that it is really that way.
Thanks for sharing the your valuable thought and experience 🙏
@@tanner1985 that's what is happening, but *why* is the voltage divider preferred over a variable resistor?
A voltage divider allows you to take a voltage and produce a lower voltage.
They typically comprise a couple of fixed resistors.
By using a potentiometer you can make that output voltage variable.
Using a potentiometer in a 2 pin arrangement gives you a variable resistor, not a voltage divider.
It is just a resistor which is changeable.
And a resistor sets the current.
A changing resistor allows you to change the current.
So it all depends on what you are trying to do, what you actually need for your application, do you want a fixed or variable voltage: => voltage divider or potentiometer, or do you want to set a current to a desired magnitude or changeable magnitude: => resistor or potentiometer using two pins.
Excellent video!! concise and clear. Thank you very much!!
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Good explanation 👍
Easy Explaination.
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Already had done @@Automatedo
Note: Never exceed the current through the potentiometer's rating or "Wattage" For Higher currents use a transistor [BJT or Mosfet] to control the load with the Pot controlling the transistor.
Thank you for the comment! You are absolutely correct. It is important to ensure that the current flowing through the potentiometer does not exceed its wattage rating. Exceeding the wattage rating can cause the potentiometer to overheat and even burn out.
Using a transistor such as a BJT or Mosfet to control the load with the potentiometer controlling the transistor is a great way to ensure that the current through the potentiometer stays within its rated limit. This configuration is commonly known as a voltage divider circuit and is a widely used technique in electronics.
Thanks again for the helpful comment!
thank u so much sir. best in utube
That’s awesome. Complete explanation. 👌👌👌
Our goal is to explain in the simplest way possible. Thanks for watching the video
That is very good info, clearly explained. But, for audiophiles, it would be great to know the effect on voltage & amperage, in each case, when the same identical potentiometer is used as a tone vs a volume control. From this video, and my knowledge that a volume control is a voltage divider...can I presume that tone control is varying amperage along with resistance? And, if so, what is the science between variations in resistance & amperage on the dominant tones or resonant peak of an audio signal???
Nice video shot, thanks, keep it up :)
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Superb instruction video!
Glad you enjoyed it! 😉
very well explained. Thank you.
It is a great video with great graphics. Would you mind sharing the Software details that are used for this great and knowledgeable video?
Thanks for showing interest to this video 🙂 | This video is created in our graphic department
@@Automatedo Keep up the good work !!
It is so helpful thank u so much sir.
Most welcome 😉
Really very informative and interesting Video 💕💕💕
Glad you think so!
Excellent explanation
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Very well explained, thanks.
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More information would be appreciated in understanding how the three prong set up is used as a voltage divider. does the circuit require a diode to the back wire to direct current through the potentiometer? would it not just bypass the potentiometer in the circuit? And if the current flow doesn't bypass the potentiometer doesn't that mean the current is flowing through the entire resistive strip to connect the circuit from the negative and positive terminals of the pot?
Thank you sir very much for this great information ☺️. I was thinking to add this in my emergency light project (I have 10k potentiometer).
You're welcome! We are glad that you found the information useful. Adding a potentiometer to your emergency light project can be a great idea, especially if you want to adjust the brightness of the lights. With a 10k potentiometer, you should have plenty of range to adjust the brightness to your desired level. Good luck with your project! 😉
very nice explanation
perfect explanation 👍
Hello, I thought that more resistance decrease voltage and current flow? for the potentiometer 3 wire configuration. Could you please explain
I think he misspoke. Pretty sure he meant to say low resistance first, then high resistance
Yes , he said wrongly
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
It depends on how the potentiometer is used.
If you use it in a 2 pin configuration then you have a variable resistance and as the resistance increases the current through it will lower.
If you use it in a 3 pin configuration, you are creating a potential divider (you will need to research yourself the theory of operation and the math behind it).
Here the output is a voltage (not a current) across the resistance between one of outer pins and the middle wiper pin. Ohms Law says: V=IR, increase the resistance for a given value of current and the voltage across that resistance increases.
So when used as a potential divider, and the output is across a variable resistance in the potentiometer, then as that resistance increases, the output voltage increases.
Good working bro ❤👍🏻👍🏻👍🏻
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@@Automatedo yes bro definitely 💖
At 4:46, is it meant to be LOW resistance? Not high
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
Increasing the resistance through the potentiometer will decrease the speed of the motor, not increase. other than that, good video👍👍
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
sir nice explantion
Thank you so much! 😊 I’m thrilled you liked the explanation! 🌟 If you found it helpful, feel free to share it with others-let’s keep learning and growing together! 🚀📚✨
Nice sir iam from india.good sir
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I didn’t know how a variable resistor works. I have a broken lamp that I needed to control it’s brightness. Now I know how to connect wires
Glad it helped 😍 Stay tuned for our upcoming videos. We are sure they will be helpful as well 😉
Thanks for the enlightenment, but is it safe to use this the same method for a dc 12v motor with 50k potentiometer? Please do it reply, thank you. From Nigeria
Yes, it should be safe, as long as the motor and the potentiometer are rated for the same or higher voltage than the battery.
However, using a 50k potentiometer may not be the most appropriate for controlling the speed of a 12-volt DC motor because it may not provide enough resolution or precision to accurately control the motor speed.
👍 wonderful video! Quick and simple
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@@Automatedosure. This response is a bit late but yes I will definitely share this video to many of my friends so that it grows ur channel cause I think I deserve more subs.
Which configuration to use for audio volume control? Would the 2 wire solution be sufficient?
For most audio volume controls, the 2-wire potentiometer should be enough. It will allow you to adjust the audio signal's amplitude without needing the extra complexity of a 3-wire setup. 😊
If you're setting up a circuit for a more advanced audio system or specific equipment, you may want to consider other factors, but for basic usage, the 2-wire is perfectly fine! 🎶
Thanks
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great explanation
Glad you liked it 😍
Thank you for the explanation! However, I don't understand the voltage divider part. When the voltage which passes through the motor is changed by the potentiometer, will the current change too?
Thank you so much!
And thank you for watching this video from our channel. Cheers 🙌
Wow very use full video
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We really appreciate that. If you like out videos, would you mind sharing them with your friends and colleagues? It would really help us grow the channel and reach more people. Thanks again for your support!
❤❤❤
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Very informative video! Keep it up!👏
Thank you! Will do!
Great video! However there is one part that isn't clear to me. Please tell me if I understand this part correctly. The resistance in a potentiometer depends on the length of the resistance element. When you adjust the knob on a potentiometer, the wiper either shortens or lengthens the element. Therefore, a longer element will have more resistance, while a shorter element will have less resistance. For instance, in volume control, the longer the resistance element when you turn it down, the lower the volume and the shorter the element when you turn it up, the higher the volume. As someone who had no prior knowledge of electronics, I thought the resistance element inside the pot had different points of resistance as opposed to the wiper actually shortening and lengthening the resistance element.
Superb work👍
Thank you! Cheers!
Nicely explained
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Thank you, this really helped! But is my resister expose to get read hot?
Nicely explained thank you 👍
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Good video, thanks a lot!
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Thanks for sharing🙏🏻
Thanks for visiting
hi, very interesting your explanation, it gonna help on my project, i have just one question before buy it, i have an mobility scooter, is my project now. i want make sure that i'll replace the original potentiometer which is (TSR 24KN resistanceResistance. Like 200k or 50k. Looking forward to hear from you. Appreciate
The TSR 24KN potentiometer has a nominal resistance of 200kΩ. However, it is possible that your scooter's control system may have been designed to work with a potentiometer of a different resistance value.
To ensure compatibility and avoid potential damage to your scooter's control system, you should refer to the manufacturer's documentation to determine the correct replacement potentiometer for your mobility scooter.
at 4:43, the ( + ) and the ( - ) of the battery are technically connected to each other and form a closed circuit, won't this overheat the battery and damage it ??????🤔🤔🤔
The + and - terminals of the battery are indeed connected to each other in a closed circuit when connected to the potentiometer and motor in a voltage divider configuration. However, this does not necessarily lead to overheating or damage to the battery.
In a voltage divider circuit, the current flowing through the circuit is determined by the total resistance of the circuit and the applied voltage. The potentiometer and motor act as resistors in the circuit, and the resistance of the potentiometer can be adjusted to control the amount of current flowing through the circuit.
As long as the potentiometer is properly adjusted to limit the amount of current flowing through the circuit, the battery should not overheat or be damaged. It is important to choose a potentiometer with a suitable power rating and to calculate the appropriate resistance values to ensure safe operation of the circuit.
Thank you brother
is that correct high resistance allows more voltage to the motor and low resistance on the wiper decreases the voltage at motor . Surely increasing the resistance drops the voltage at the motor due to voltage drop
good explanation 🤩🤩
Glad you liked it 💮
Bravo well done 👍
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What is the name of the program you made the video on? It means the program in which the electrical circuits were drawn. Can I know it?
Dear Abdalla, these fabulous tutorials are made by our animation department. I will send them an email and ask them about it.
@@Automatedo Thank you very much. I want to know this information please reply. Thank you
They are using Photoshop to design the elements and use the after effect to give the elements motion
Hi, I have followed all the instructions as in the video, I am using a 100k potentiometer and a 1 to 6 volt mini dynamo, but why is the Potassio emitting smoke, please give me instructions bro
I have a question about the 2 wire configuration with the led. If I connect the cable to the 3 pin(negative) and would turn it counterclockwise that the resistance increases and the led becomes weaker and if I turn it clockwise it gets brighter? so the exact opposite as mentioned in the video, thanks for replying😊
Hello. I have an interesting case. What if I have a variable resistance load (500 ohms-7000 ohms). I want to increase the voltage or force a current amount across it to generate controllable heat. How can I achieve this result with a power supply having an output of 0-30V and 0-10A? I appreciate your help
very useful ♥
Helpful 👌
THANK YOU A TON!
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Thanks that was helpful
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Very awesome.. Keep going
We will try our best
Very useful .thank a lot
Keep watching
I need help. I have a 750 Watt incandescent light bulb that I want to operate adjustable between 0 and 100 watts. I’m currently using a conventional dimmer switch and the switch and bulb are humming-hence, I’m looking at possibly using a potentiometer. IF a potentiometer will work for this application, how do I ‘size’ it? It’s running on a 120vac 60Hz supply.
Thank you
How would this thing work on a lathe motor whereby you starve the motor of current, to slow the speed of the motor, then introduce, a heavy load to it. Will that burn the motor out in short order?
And how reliable are these units per-se, are they themselves prone to failing?
Thanks.
When it comes to controlling the speed of a motor, especially in applications like a lathe where heavy loads are involved, it is important to consider the motor's specifications and limitations. While a potentiometer-based voltage divider method can be used for speed control, it may not be the most suitable or reliable method for high-power applications like lathes.
In scenarios where you want to slow down the motor by starving it of current and then introduce a heavy load, it can lead to increased stress and strain on the motor. This can potentially result in overheating, reduced efficiency, and even motor failure if the motor is not designed to handle such loads.
For heavy-duty applications like lathes, it is recommended to use motor control techniques specifically designed for high-power and variable-speed operations. This typically involves using motor controllers, motor drivers, or specialized speed control systems that can handle the power and current requirements of the motor while providing better control and protection mechanisms.
Regarding the reliability of these control units, it depends on the quality of the components, the design of the circuit, and the operating conditions. While potentiometers themselves are generally reliable, other components in the control circuit, such as transistors or motor drivers, may be more prone to failure if not properly selected or protected.
Can you explain to me how to select the value of potentiometer such that when I have a supply voltage of 9 volts, and I draw 50 milliamps of current, the voltage doesn't drop by more than 0.1 volt?
Indeed, selecting the appropriate potentiometer value can be a bit tricky. To answer your question, you'll need to calculate the resistance value of the potentiometer based on the voltage drop and current draw specifications. You can use Ohm's law (V = IR) to solve for the resistance value. Resistance value = 0.1 / 0.05 = 2 ohms. However, keep in mind that potentiometers have a limited power rating, so you should also make sure that the potentiometer can handle the current draw without overheating or exceeding its power rating.
Can i put potentiometer between the speaker and the dvd componant to increase or decrease volume of the speaker individually ,????
Plz help
Yes. To do this, you will need a potentiometer with the same resistance as the speaker. You can find the resistance of your speaker by looking at its specifications or by measuring it with a multimeter.
Once you have a potentiometer, you will need to connect it in series with the speaker. To do this, connect one end of the potentiometer to the positive terminal of the speaker and the other end of the potentiometer to the positive terminal of the DVD component. Connect the negative terminal of the speaker to the negative terminal of the DVD component.
Once the potentiometer is connected, you can adjust the volume of the speaker by turning the potentiometer knob. Turning the knob clockwise will increase the volume, and turning the knob counterclockwise will decrease the volume.
for a 12vdc motor with a power source of 12vdc either Battey or adapter, what kilo omhs of pot should be used so it won't burn ❤️🔥.
But brother how can I determine that which configuration I have to use ? For example last week we did in laboratory common source amplifier experiment.
wow, thank you so much
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Bisakah mengukur Potensio ohm pada rangkaian PCB Yang Sudah terpasang komponen lain lainnya ?
Of course! 👍 You can measure the potentiometer's resistance on a PCB even if other components are already installed. ⚡ Make sure your multimeter is set to ohm mode and connect the probes to the potentiometer's terminals. If possible, take the measurement while the circuit is powered off for more accurate results. 🔧📏 Hope this helps! 😊
Wow
Very well 👏 👌
Thank you! Cheers!