One of the best tutorials on LDR and vivid explanation in a grammatically correct English which is simple and easy to grasp by even a layman like me! Theory, principles involved and a beautiful explanation on the practicals! Thank you so much! Looking forward for more in future!😊
Dunno if anyone cares but if you're stoned like me atm then you can watch all of the latest movies on instaflixxer. I've been binge watching with my girlfriend for the last couple of days =)
You are awesome. You have the best, easiest to follow electronics projects on youtube. There is no distracting electro music or confusing information. Thank you sir for giving the greatest gift, knowledge.
Thank you, perfect for what I'm looking for: My Motorcycle has no fuel warning light so I'll be using this type of cicuit (modified) to detect the presence of fuel in my fuel line just below the fuel tap - I'll be adding a short 'clear' tube to the existing line & then fully enclosing the project, adding a small *𝒃𝒂𝒄𝒌𝒍𝒊𝒈𝒉𝒕 adjacent to the LDR on the opposite side of the line (this will then be connected to an LED warning light on my dash). * The idea being that there will be detectable differential in the strength of the *𝙡𝙞𝙜𝙝𝙩 𝙨𝙤𝙪𝙧𝙘𝙚 as the clear tube becomes devoid of any fuel. It will give me time to engage the reserve tank via the tap (as the carburettors hold a small amount of fuel in their float chambers) - there ain't nothing worse than feeling that sudden drop in engine power as you unexpectedly find yourself on empty!!
Thank you.. Nice electronic project.. very understandable explanation and easy to follow diagram presentation.. keep doing such informative videos.. it helps people understand and enjoy doing electronics projects..
very hadly find these kind well explain vidoes,, other just build the circuits,, u r awsome... ad more and more video,, i will ask my feind to subscribe,, i am from New York.. love this video,,,
Very nice explanation and easy to follow! What I don't understand is why a higher resistor in series makes the LED turn on with less light, and not the opposite way.
Hello, well done for the clip. I will take this experience and work on it, but I have a problem. Our doctor wants a report on this experience and I do not know what to write. Do you have any of these?
Nice explanation. However, it would have been good to see a schematic with the potentiometer inserted. It's a bit difficult to figure it out by just looking at the changes you made on the breadboard.
Depends on which transistor you are using. If it can drain higher power, you may try directly connecting the DC motor. Otherwise you need to add another transistor/mosfet to this circuit's output and connect motor to it. (See: Driving a DC motor using transistor / mosfet)
I'm just trying to understand why we need more resistance in dark sensor (47k) as opposed to the one in the light sensor (1k). If anyone can elaborate on that a bit, that'd be hugely appreciated.
is it to drive more power to the LED, as the resistor is in parallel to the LED, by keeping the resistor high in value we direct more of the current to our LED instead of wasting on the resistor?
Great video. I installed a porch light with built in dusk to dawn sensor. Light turns on even when there is plenty of light outside. sensor is facing the street. Can I modify by adding a resistor etc. so it turn on when there is dark outside. Thanks and take care.
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
My ldr circuit led keep-on in room light but when i shine mobile torch on it it turn-off as it suppose to. My question is that why led is not turning off at room lightning and turning off at mobile torch light?
What common MOSFET can I use instead of the transistor for driving a bigger load (say 8v @ 10mA) ? Also which LDR, there's different ones with different resistances.
I think to control an AC voltage you would probably have to feed the transistors output, which normally supplies the led, to a relay. By doing this the ac voltage would then be isolated. I think you could use a triac also which is made to control ac voltage. If you do a search on RUclips for the things I’ve mentioned I’m sure you’ll find what your looking for. Hope I helped you at least a little.
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
If you want to save time ordering one on eBay or Amazon just go to Walmart and buy one of their cheap led night lights that is light sensitive. You can buy them in a three pack for maybe three or five dollars. Then take them home and unscrew the case and cut the LDR out and you’re ready to have fun experimenting!
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
Hi. Found a night light with one component labeled PCR 606J, one tiny resistor with Red, Black, Green and Gold bands in that order and a light sensor. Don't know what the PCR 606J is? Thought it was a transistor, but it may be a tiny SCR. Are you familiar with this type of light sensor circuit? Cheers
I would like to use 10 leds with 12v and a lightsensor. Is that ok. or do I have to use one transistor for every led? Regards from Christer from Uppsala
One question- For the light detector circuit when the photoresistor is 0 Ohms, aren’t we applying input voltage (let’s say 12 V) to the base of npn transistor? If yes, will this not damage the transistor? Can you please clarify.
@@TheWildElectron Thank you for the reply. However, by pointing the mobile flash light directly to Photo resistor, I was able to measure the resistance under 200 Ohms. So not sure if I understood your response correctly or not.
Hello bro I'm a big fan of ur voice. And I request you to make a video about the speed control of a DC motor using this same LDR method . Pls bro plzzzzzzzzzzzzzzz. I'm waiting for that video bro pls. Thank you
Hi I want to know that what this bc 546 refers why didn't you used 2n2222 in place of that ,I am very confused.please make tutorial on it , because there nothing on RUclips about the transistors,which show us what these numbers refers.
Can any one help to as to how to select the potentiometer of correct rating. I have 22,3 V (max) of supply from solar panel which is connected to zener diode circuit with parallel resistor of 1 k ohm to zener diode (3.0V) and parallel to zener diode is another resistor of 820 ohm which is connected to the photo transistor (BPX38-3 OSO) with Vce = 50 V, Vbe= 7 V maximum values. Between the ground and the emmitter of the photo transistor i have to connect the potentiometer which control the sensitivity of my photo Transistor to supply voltage to the gate terminal of MOSFET with Vgs= 16 V and Vds = 100 V which is connected to the actuator which is to be controlled with the phototransistor.
@@khadijasoomro3519 photo-resistor is a passive component and so it is easy to test. Eg: You can just replace it with a resistor and see what the output will be.
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
One of the best tutorials on LDR and vivid explanation in a grammatically correct English which is simple and easy to grasp by even a layman like me! Theory, principles involved and a beautiful explanation on the practicals! Thank you so much! Looking forward for more in future!😊
Thank you for the compliment!
This gentleman is a very good teacher and explains principles of circuits well, thanks
I tried many times this experiment but only after watching your video I succeeded. Thank you a lot😊
The explanation was great i've seen many vids like this but none of them explained like u great work bro!!
Dunno if anyone cares but if you're stoned like me atm then you can watch all of the latest movies on instaflixxer. I've been binge watching with my girlfriend for the last couple of days =)
@Mekhi Gary Yup, I have been using instaflixxer for since november myself :D
You are awesome. You have the best, easiest to follow electronics projects on youtube. There is no distracting electro music or confusing information. Thank you sir for giving the greatest gift, knowledge.
Amazing. I finally got it working after hours and hours. It will not work on an unregulated power supply so I tried a 6V battery and it worked!!!!!
Maybe you can use 9 volts for this?
By using a resistor of 270 Ohms?
Actually, his videos were very educational and understandable. I think you were new to Elonics and Electronics maybe?
Great thing about your videos is you explain everything in good manor
Excellent video. Very educational. Thank you for covering it so comprehensively. Thank you for sharing.
You're welcome
Can you plz tell the reason that while using 1K resistor, it's light activated and while using 47K resistor, it's dark activated, why ?? Plz tell
The order of the resistor and ldr is also changed which results in voltage to decrease instead of increase.
this video was really helpful specially the circuit diagram for the darkness sensing circuit
keep going brother
Nice to see you making videos again. Thank you.
You are welcome trickybilly
Thank you, perfect for what I'm looking for: My Motorcycle has no fuel warning light so I'll be using this type of cicuit (modified) to detect the presence of fuel in my fuel line just below the fuel tap - I'll be adding a short 'clear' tube to the existing line & then fully enclosing the project, adding a small *𝒃𝒂𝒄𝒌𝒍𝒊𝒈𝒉𝒕 adjacent to the LDR on the opposite side of the line (this will then be connected to an LED warning light on my dash). * The idea being that there will be detectable differential in the strength of the *𝙡𝙞𝙜𝙝𝙩 𝙨𝙤𝙪𝙧𝙘𝙚 as the clear tube becomes devoid of any fuel.
It will give me time to engage the reserve tank via the tap (as the carburettors hold a small amount of fuel in their float chambers) - there ain't nothing worse than feeling that sudden drop in engine power as you unexpectedly find yourself on empty!!
Pefect! That's a great idea. Small automation's like this will make our daily experiences seamless.
Good Explanation! I liked it so much! Everything you made is working! Keep It up Elonics!
Great thanks, this video help me to build my project
Can you help me out too...i want to make this project so can you give me the precautions i should take or the mistakes that you might have committed
the one that truns on in the dark was so helpfull thank you
me trying again but nope dose not work loll
Thank you for making this video. I spent hours searching and this is finally exactly what I needed. Your other videos are very interesting as well.
Thank you.. Nice electronic project.. very understandable explanation and easy to follow diagram presentation.. keep doing such informative videos.. it helps people understand and enjoy doing electronics projects..
You're welcome. And thank you for the motivating feedback :)
Ty for showing it really helped me in class
Liked and Ticked the notif bell...Goodprojectand explanation... Keep it up..
You explain very well and I thank you.
Excellent, simple description. Thank you.....
You're welcome
Highly Appreciative..
Your project has helped me in making my project m making there reports.
Thank u for being a blind Help🍁
You're welcome!
very hadly find these kind well explain vidoes,, other just build the circuits,, u r awsome... ad more and more video,, i will ask my feind to subscribe,, i am from New York.. love this video,,,
Very nice explanation and easy to follow! What I don't understand is why a higher resistor in series makes the LED turn on with less light, and not the opposite way.
Thank you it helped me every much in my school project
Great work sir!
Very well explained. Thank you!
I am impressed to your explanation sir it's really excellent 👌🔥
IT WORKED! great vid! Thanks!
You're welcome!
Hello, well done for the clip. I will take this experience and work on it, but I have a problem. Our doctor wants a report on this experience and I do not know what to write. Do you have any of these?
excellent chakri...great work!!
Thanks ra
Your video is very good for learning
Great projects,simple to understand.
THANK YOU SO MUCH SIR!
You are an awesome man.
Nice explanation. However, it would have been good to see a schematic with the potentiometer inserted. It's a bit difficult to figure it out by just looking at the changes you made on the breadboard.
Excellent tutorial. Thank you sir
You are welcome
Thanks a lot for this video... It was very helpful !!!
What changes must be made if we need to replace dc motor in place of led. Should any resistance be varied.. Pls reply @elonics
Depends on which transistor you are using. If it can drain higher power, you may try directly connecting the DC motor. Otherwise you need to add another transistor/mosfet to this circuit's output and connect motor to it. (See: Driving a DC motor using transistor / mosfet)
@@elonics its a 3-9v dc motor and transistor used is bc547 to a 9v battery
Very informative, thanks.
You're welcome
I'm just trying to understand why we need more resistance in dark sensor (47k) as opposed to the one in the light sensor (1k). If anyone can elaborate on that a bit, that'd be hugely appreciated.
is it to drive more power to the LED, as the resistor is in parallel to the LED, by keeping the resistor high in value we direct more of the current to our LED instead of wasting on the resistor?
Great video. I installed a porch light with built in dusk to dawn sensor. Light turns on even when there is plenty of light outside. sensor is facing the street. Can I modify by adding a resistor etc. so it turn on when there is dark outside. Thanks and take care.
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
Aptly great explanation, v useful proctice. . Thank you Sir I'm following up. ...
This isn't working when I make it I use a 330 ohm resistor with 3 volt power supply....
I think the base is shorting to ground..
Pls help!
Awesome video as alwazz... keep going..wish u LUCK😂
How does the fact of reverse thé resistance and the ldr, make it a night sensor ?
I try your IR proximity sensor circuit but it won't work. Would pls give the circuit disgram to make it easier. Thanks sharing.
My ldr circuit led keep-on in room light but when i shine mobile torch on it it turn-off as it suppose to.
My question is that why led is not turning off at room lightning and turning off at mobile torch light?
Can I swap the photo resistor and variable resistor so that the LED turns on when there is light and turns off when it is dark?
Very nice explanation 👌
In this light sensor circuit instead of light(LED),WE use the motor
Can this be used to trigger a relay? Im planning to make this and install it in a car without automatic headlights on.
Link for circuit diagram is disabled it seems.
Please do something 👍.
By inserting the LDR with PIR would I still need 10k potentiometer for LUX adjustment or will the 501 potentiometer will work?
What common MOSFET can I use instead of the transistor for driving a bigger load (say 8v @ 10mA) ? Also which LDR, there's different ones with different resistances.
Would this work on a 110/220 volts led bulb? The ones used on regular lamps. Thanks.
I think to control an AC voltage you would probably have to feed the transistors output, which normally supplies the led, to a relay. By doing this the ac voltage would then be isolated. I think you could use a triac also which is made to control ac voltage. If you do a search on RUclips for the things I’ve mentioned I’m sure you’ll find what your looking for. Hope I helped you at least a little.
@@user-wy3xe2tt3y Thanks!
Welcome back! 👍
👍
Thank you! Feel very capable after being able to make this even if it's ot much its a start
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
@@حسنعامر-و3ب it depende is the led just not turning on or it's always on , it might be the resistir or the wireless are connected properly
@@MemoThePanda The led is on normally, but when I put my hand on the sensor, the led does not turn off
Could anyone explain how just changing the places of ldr and resistor changes what makes the transistor work?
Sir ,can we replace the npn transitor in the given with JFET transistor
can you find these LDRs in stores or can you pretty much only find these online?
If you want to save time ordering one on eBay or Amazon just go to Walmart and buy one of their cheap led night lights that is light sensitive. You can buy them in a three pack for maybe three or five dollars. Then take them home and unscrew the case and cut the LDR out and you’re ready to have fun experimenting!
Hi, do have tutorial for this circuit using 2N3904? thanks in advance
Hi! I don't get the potentiometer connection. Can you please help me out ?
what with that resistor connected series with the led what should be the rated value and how can i get that
Could I use 2n3904 transistor instead of bc547?
Yes you can. Just make sure you match the emitter base & collector pins.
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?
How can i connect a relay i this circuit, i have used relay but it is turning on and off, (the voltage is decreased at output)
Hi. Found a night light with one component labeled PCR 606J, one tiny resistor with Red, Black, Green and Gold bands in that order and a light sensor. Don't know what the PCR 606J is? Thought it was a transistor, but it may be a tiny SCR. Are you familiar with this type of light sensor circuit? Cheers
I would like to use 10 leds with 12v and a lightsensor. Is that ok. or do I have to use one transistor for every led?
Regards from Christer from Uppsala
One question-
For the light detector circuit when the photoresistor is 0 Ohms, aren’t we applying input voltage (let’s say 12 V) to the base of npn transistor? If yes, will this not damage the transistor?
Can you please clarify.
Photo resistor value never fall below 10k
@@TheWildElectron Thank you for the reply.
However, by pointing the mobile flash light directly to Photo resistor, I was able to measure the resistance under 200 Ohms.
So not sure if I understood your response correctly or not.
Can this be done with a 120v set up?
Hello bro I'm
a big fan of ur voice.
And I request you to make a video about the speed control of a DC motor using this same LDR method . Pls bro plzzzzzzzzzzzzzzz.
I'm waiting for that video bro pls.
Thank you
Excellent video. I am going to build the darkness detector circuit but add a timer that shuts off the light after a few hours. Any suggestions?
Hii
Did you make the dark sensor circuit?..I am unable to make it
is it posibile to change leds with a light bulb and work the same way?
Thank you..very good video
Bravo bien expliqué. 😁
Will this diagram work on a 12v DC light ?
Hi
I want to know that what this bc 546 refers why didn't you used 2n2222 in place of that ,I am very confused.please make tutorial on it , because there nothing on RUclips about the transistors,which show us what these numbers refers.
shashwat sangle Those two NPN transistors are essentially the same, just favorites in different parts of the world. Use what you have.
I cannot figure out where should I put the pot for the dark sensor. Please help me
You need to connect the center pin of potentiometer and any one of the pins at the ends, in place of the resistor
@@elonics thank you
Would this work if you used an LED strip instead of an LED
nice video Sir. plz upload more electronics videos
Thanks, sure!
i wanted to use this circuit with a relay but it cant turn it on why is it?
hey can u plz show how to make transmitter and receiver(ir) for wire less car
great video, thanks
Can you convert the motion sensor to a metal sensor, thank you
Can I get synopsis and report on this project
How much is the total resistance of this sensor? thank you
Can we plot ir sensor circuit with 555 Ic...
Can any one help to as to how to select the potentiometer of correct rating. I have 22,3 V (max) of supply from solar panel which is connected to zener diode circuit with parallel resistor of 1 k ohm to zener diode (3.0V) and parallel to zener diode is another resistor of 820 ohm which is connected to the photo transistor (BPX38-3 OSO) with Vce = 50 V, Vbe= 7 V maximum values. Between the ground and the emmitter of the photo transistor i have to connect the potentiometer which control the sensitivity of my photo Transistor to supply voltage to the gate terminal of MOSFET with Vgs= 16 V and Vds = 100 V which is connected to the actuator which is to be controlled with the phototransistor.
Why your are using the 10k resistor for light sensor and 100k resistor for darkness sensor ?
Awesome video, I will also make and post in my RUclips channel
Can i get the circuit daigram of LDR dark sensing circuit...
I still didnt get why the darkness sensing curcuit makes the LDR work in the opposite manner could anyone explain it better please?
what is better among photo-diode n photo-resistor?
photo-resistor is better. It is easy to debug.
Can I have a bit explaintion about it ?
How Photodiode are better then photoresistor? In what aspects?
@@khadijasoomro3519 photo-resistor is a passive component and so it is easy to test. Eg: You can just replace it with a resistor and see what the output will be.
Sir can we use this for 220V ?
Yh ive tried it, it doesn’t work. The LED turns on but doesn’t change depending on light
How long would a 9 volt battery (PP3) last?
Sir,how can i made the same with the supple of ac?
Thanks for your complete explanation. But I didn't understand some parts of your speech.
Can you be more specific on which parts you didn't understand? I'll try to improve from the next video.
@@elonics As I said, you have explained well but I think you can improve your accent to transfer your intent more efficiently😉
Thanks :)
Okay, I'll look into it. Thanks for the feedback :)
Everything was quite clear to me, thanks elonics
Can we use any other resistor instead of 1k ohm??
Yes. I've discussed about the range of values in the video
What would be the output voltage or voltage on LDR
Hello, my sensor does not work. I don't know the problem. Is the reason that I used a resistance of 1 k instead of 470 ohms, and I also used a voltage of 9, not 12?