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What is a Voltage Regulator? How Does it Work?
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- Опубликовано: 16 авг 2024
- In this lesson, I will basically explain the working principle, structure and types of voltage regulators, which is one of the indispensable circuit element of electronics and used on many electronic cards. Voltage regulators have 3 pins. The first pin indicates the input, the second pin indicates the ground, and the third pin indicates the output. The main usage task of voltage regulators; is to convert a certain range of DC voltage at the input to a constant voltage at the output. So let's see how it works now in this video.
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It is a good explanation of LM78XX voltage regulator with capacitor for voltage stabilization. It was really helpful. Thank you
☺️🙏
I always like your illustrations and explanations sir thank you
I'm glad the videos were helpful. Thank you so much 😊
I feeling quenching thirsty thr drinking a cold water in state of perspiration . Really, you shared me eye opening lesson today . sorry for my being late after 1 yr . You are good lecturer for people in difficulty of english as me . good day to your + yours all fam . I love electronics !
Maybe I took the title too literally. I wanted to know how a voltage regulator works; as in how it is constructed and by what principle it achieves it's purpose. I don't care about the specific names of different regulators.
Thank you. This video cleared up a lot of questions I would definitely have run into.
very professional and easy explanation
Thank you so much 😊
I am new to electronics and really appreciate your great explanation. Subscribed
Thank you so much ☺️🙏
LOL.... that's precious
No, But seriously though, I've been doing electronics since i was like 6 years old, I'm 49
it's cool that you're into electronics and WE (The Old Generation of Electronics) APPRECIATE YOU AND YOUR INVOLVEMENT IN WHAT WE LOVE DOING
and we appreciate you carrying it on .
Now... if you want to know how to get started and you need a helping hand or a zoom chat or something explained, you let me know ok.
I only require that you speak english if you want me to explain anything to you
Beyond that i only require that you want to learn.
let me know where you are in your experience, what equipment you have and what you are working on right now
and i'll show you the path for the next few steps
Whenever you are new, no doubt you are going to be confused and not know what to do
WE ARE HERE TO HELP, don't worry about it.
The Electronics community is cool
YOU ASK, WE HELP.
I love this channel. You saved my life, thank you 😃
Thank you so much ☺️🙏
Most circuits require a supply voltage that is constant independent of the current consumed. Even a small over-voltage could prove destructive, and this is why regulators should be used. But regulators also help a great deal in eliminating mains hum in audio amplifiers. In signal generators or oscillators, the output frequency will vary with supply voltage and must also be well regulated to keep this constant.
Thank you for your contribution 🙏
You get better regulation with the 7800/7900 series regulators with two volts higher input than the output voltage. The LM337 is used for adjustable negative voltage. the LM350 is a higher current positive adjustable regulator.
READ the SPECIFICATION SHEET. Different regulators have different requirements for the input and output capacitors. READ THE SPECS!!!.
As Elon would say.. just read the instructions.. with the absence of bypass caps the reg can give erratic voltages as it produces rubbish AC.. ie unstable. oscillations.
Really useful lesson thanks
Doesnt explain HOW, just what, and how its used in applications, not what its actually doing to regulate the voltage
Made sense to me
It’s sufficient for an electronics newbie.
@@mguerramdbarely
This was so easy to understand. Thank you.
Creative video, thanks :)
Thanks for the video!
Very nice video. Thanx
At 4:35 where you have the 7905 VR isn’t the electrolyte capacitor wired wrong? Shouldn’t the negative side be connected to the red side?
You are right, ive searched up a datasheet and it also shows the negative side of the capacitor should be connected to the red wire in this case. If connected like this the capacitor will blow up.
no it wont blow up? negative of the capacitor is on negative terminal (black)
@@pain2737 Colour for output pin is wrong and if you measure output pin and negative rail, you get 0v because there is not much potential difference exist.
That means you have to use 7905 output pin and original powersources positive lead. Dont let the colours fool you with this one.
:)
wow !! 0:11 on the far right , this component , I was inspecting it on my pc monitor's video pcb , asking myself if it was a transistor or a diode . I got reading in every position I put the probes
Did you get a reading with the power ON or OFF ?
The readings you should get is..
Continuity - GND Pin to a Ground Source like a screw terminal on your PCB or heatsink, You should have continuity
Should have no continuity from GND Pin to Pin 1
Should have no continuity From GND Pin to Pin 3
Resistance GND to a GND Reference on the board, should be Low Resistance, < 0.3 Ohms
GND to Pin 1 - OL
GND to Pin 3 - OL
Volts DC
Gnd Probe on a GND Reference
Red probe on Pin 1 should read the input voltage
Red Probe on Pin 3 should read the Output Voltage
Red Probe on GND Pin should read 0V DC
if you are getting continuity between all pins when Not energized You have an internal short Circuit
in this case you would have either Lower voltage than expected of more likely , no voltage on the output
thanks for the video. In the case of the adjustable voltage regulator, what is the function of R1? what would happen if R1 was removed so that R2 only connected the ground pin to negative/reference voltage?
This doesn’t really help. I don’t understand why so many people teaching this stuff will gloss over how something actually functions and how they use the seemingly arbitrary values they use, and on the other hand, get into very precise detail overkill when it comes to simple, basic things, such as the naming conventions and how they output the same voltage but different amperage. That could have taken a few seconds but it’s like half the video, whereas this never explains how the resistor in the circuit works. Wouldn’t it drop it below the 5v output? That’s kinda what resistors do. They affect both voltage and current.
Thanks
I want to design and build a voltage regulator. Input is from a fairly stable hydro-turbin producing from 20-30 AC volts and 20-50 amps to Dc voltage about the same. Desired output is from 15-30 volts DC via rectifier. It will then go to a charge controller to two 12/100Ah LIPO4 batteries. I can make them 24v which will require around 29v to charge or 15v to charge them as 12v array. The reason for voltage regulator before charge controller is that the charge controller wants to send resistance back to PM motor to shut it off. The motor will not restart without a hand spin up from me. In appreciation for any help.
what is the difference between a voltage regulator and a zener diode?
So super sir thank you
Thank you so much 🙏🏼
Very much useful.
Thank you so much 😊
very good .
No mention of input capacitors, or the fact that these things get hot?
How it work
For the surfrace mount variety of the 7085, should I connect the metal tab to a heat sink or connect it to anything, or does it just sit there?
Thank you
Sir
Thanks that you always explain very clearly. I salutes you.
Sir can you give me idea of any biomedical equipment project like
Electro surgical?
Thank you so much ☺️ Unfortunately, I don't have very detailed information about biomedical equipment. But if I can, I will share 👍
@@eeapplications
Sir
Its my pleasure to receive your message. We will be so glad if you kindly send me details with circuits diagram of a Electro surgical diathermy machine 400wats
@@AliReza-xk7if
LOL....
WHY DON'T YOU GO FIND IT YOURSELF ?
I mean, it's not like you're asking for the datasheet of a MOSFET or Relay
1. You're asking for a specialized piece of equipment
2. YOU HAVE NOT EVEN SUPPLIED A MODEL NUMBER
3. You just said ............. FIND IT !!!
Now... Do you not think that's JUST A DAT Disrespectful
Here are the largest suppliers of BioMedical Equipment
McKesson Corporation. ...
Medline Industries. ...
AmerisourceBergen. ...
Cardinal Health. ...
Owens & Minor Inc. ...
Henry Schein. ...
Health Products For You. ...
Axiom Medical Supplies.
That Took me around 5 seconds to find
Now... Call them all and find the equipment that you want and ASK THE MANUFACTURER FOR THE DATASHEET
that's usually how you get these things
Thanks..
Could coupling of capacitor or coupling of zener diode be better
Please tell me what voltage regulator i need to get 5V 3a ? for 5V 2a i know L78S05 i need. But for 3a ? Thank you
Nicely presented. Would there be virtue in using a 7805 in conjunction with a 7905, in order to simultaneously regulate both the + & - of the output voltage?
sure
At the two minute mark why is a resistor required in the circuit. If the input to the diode is 5 V, then why not just connect the diode directly to the output of the voltage regulator?
current limit i think
Very well.explained
Hi can i use this for a home made generator? Idk but i think the generator can do 6 or more volt what do i nees to change and i trying to charge a power bank
very helpful.
Thank you so much 😊🙏
Or if we use a variable thermistor between output and gate be perfect
@2:38 The LED doesn't get 5V since it's in series w/ the 330 Ohms resistance, but rather Vled = [ Rled / (Rled + 330) ] * 5V
Hello. Yes, it will be as you say. I didn't give that detail because I showed the basic working logic. Thank you for your contribution.
the resistor is limiting the current - not dropping voltage. that is a common mistake
I thought the resistor was chosen to ensure the appropriate voltage across the led which as the previous comment states varies by LED. When calculating this resistance current is not considered.
Hello friend, I heard that it is possible to get -24V from the L7824, using another source, for example, 5V. So, how should connections be made? Thanks.
You might want to take a look into the data sheet of your specific chip's manufacturer, they often come with example diagrams regarding their implementation
Thanks,
Great videos
Can 3 L78S05 voltage regulators be used in parallel to give permit 5.2A?
Try it out on the breadboard
No, keep in mind the L78S05 aren't perfect clones of one another.
For example Voltage Regulator A wants to produce 4,99 volts and B 5,01 volts. Because B will give out 5,01 volt A will turn off to bring it back down to 4,99V but B wont let it, if you got a load to it B will overheat since its doing the work for 2 and turn off after some time and A will take over until B is cooled down again. This will be a constant fight between these 2.
There are some ways to avoid this but your better off purchasing a higher power one or a buck converter
Wow! For me this is gold! I am in AFRICA please forgive me MY round hut is cold, I need energy. So I study technology here on RUclips. The average man here knows nothing about this thing, I am glad I have the internet, thanks to Peter Thiel and Zuckerberg, now I can talk yo the world live. love 😍 is peace, pray for Israel🇮🇱, pray for peace✌ am out!
Dramatic entrance and exit
Try using a linear voltage regulator for heat in your hut
Does it work with reverse current?
❤❤❤Nice
7 Segment Lesson Please
Which is best for 9 volt router, 12 volt onu...step up,down module....or 7809, 7812 transistor with capacitor.....
7809
Good x plane
🫶🫶🫶 👌👏👏👏🙏💖 💚 🤍 🦁 ❤
Thank you master 🌾
Why the hell are all the mosfets, transistors, regulators and all look the same, are the makers stupid or does this have a purpose?
Read a book.
I think we should provide an answer to Fiji Law, since he made a very logical question. Some of you keep insulting the asker without helping.
Device housings are made under specific regulations, independend by device type, but by the power they consume. Power produces heat and it must be removed by some kind of cooler, so its practical to have the same housing for the same cooling needs. For details you can look for all type of housing (i.e. TO-220) and the Power they can handle.
Input should better include a Capacitor too.
Yes it could. But it may not be if the input voltage is regular.