⚠Notice : If you are using BC547 instead of 2n3904 (I made the video with 2N3904),you need flip the BC547 (face down) , since BC547 pins out are different from 2N3904 , BC547 is CBE(123) , 2N3904 is EBC(123)😊
Very nice video....unlike many other faulty circuit diagram on the internet...it truly works and works perfectly...I used a 3.75 battery with the circuit and it still works just fine
At beginning I said it doesn't work, But now am saying it's work, the led will be high at beginning because the LDR is fasing what can be considered low light according to it size. Try different sizes of LDR and you will figure it out.
there is voltage divider with 10k and photoresistor transistor haves 0.6v threshold, if base-enitter voltage is smaller it will not open when photoresistor have no light, it increase ohms and voltage drop on it is higher, then transistor opens if it have light, it have low resistanse and voltage drop
Sir i did this with bc 547 1k resistor 100 ohm resistor 3v led light Ldr Hiwatt battery Sensor is not working light on directly what to do sir Please reply
This is great! How can I modify this so that the light goes off after a set amount of time, lets say 6 hours... What do I need to add to this circuit to create that functionality?
Hi Hosein Goodarzi , just try adjust the resistor which connected to the base pin (the middle pin) of the transistor , replace it with a variable resistor :)
Hey, I wired my circuit like that but for some reason it will only turn off if I shine a strong light (such as my phone's torch) directly into the ldr. I'm making a card game board and I want the light to be off until the ldr sensor is covered by a card. ..so basically it's not working like yours. xD any help you can offer would be appreciated man
Resister n 1k at base of Transister not required just short it, Instead use 330ohms in collector in series with LED to prevent its failure while using it.
It would be great if you actually told us, how it works. As looking at it now, it is hard. I believe it does kinda "NOT" operation... and puts voltage into the LED only if the photo sensor is off. But not sure how exactly the current flows.
⚠Notice : If you are using BC547 instead of 2n3904 (I made the video with 2N3904),you need flip the BC547 (face down) , since BC547 pins out are different from 2N3904 , BC547 is CBE(123) , 2N3904 is EBC(123)😊
Its not working for me my led working every time 😔😔
Can I use ST8550D transistor?
T
@@_Tane_media ya that's what
😂
Very nice video....unlike many other faulty circuit diagram on the internet...it truly works and works perfectly...I used a 3.75 battery with the circuit and it still works just fine
Instead of a 1k resistor, I would recommend adding a 50k or 100k potentiometer so that you can adjust according to the room lighting.
not required for 3v power supply
Forget the circuit m using nail cutter to cut the pins ,thanks 🤩😂
I do that too, glad i'm not alone.
Yo bro me also
😜
Im also
I did it but my nail cutter broke.sad life🥲
Very best new project thanks for you sir
its very informative but plz do tell in more details. i love to see this. stay blessed.
Useful video congratulation
Mr. Nail Engineering 😃😃
Could this be tested with 12v and if not what would I need to make it work with a 12v(3s lipo)?
Just connect a resistor according to ohms law formula of resistance
God circuit you only bro😍😍
Very best new project thanks for you sir
It works amazing but, why does it never stop lighting up? I want it to depend on the lighting but it just always lights up
प्रतिरोध के मान परिकलित कर ही प्रतिरोधक लगाने चाहिए!
please add the circuit diagram for this project
I'm using it as a relay, thanks for the idea
Working very perfectly I have make it
Thanks for your project help me in national Science Day
It also works with bc547 I have tried it
What is the ldr resistance
Nice working night led .. THANK FOR IDEA.
Works well, but power to the LED is lower, so the light is not as bright. Maybe a different resister would work better?
it needs to be 330 ohm resister ok!!!!!????????? and i have not watch this video yet thats why its been 2 months ok
Very good but is there any way to tryout with a bigger bulb...
VERY NICE CIRCUIT FULL WORKING 👌👌
Im asking sir if is it ok to use any type of npn transistor??
I have here 2n5551 transistor
You should be able to swap that out with out any issues. Just check the Datasheets, make sure you match up the pins.
can I use resistors with values of 520ohms and 1.2k ohms for this circuit ?
No, there will be more current in the circuit.
😅😅😅😅😅well information good show 😅😅
VERY NICE👍👍👍
Great project! What I'd like to do is also power the led with an old phone charger. Can you give some help on that? A new video will help a ton! :)
Can we few more leds instead of one to increase the brightness???
My one is working thank you so much
Yes. It works properly. I make it by BC547.
Bro i like the most i have seen ever
Please tell why did u use 1k and 10k resistors?
This is really working and my project is also working
When the led is off current has continued?
How to do solar lamp same this idea
At beginning I said it doesn't work,
But now am saying it's work, the led will be high at beginning because the LDR is fasing what can be considered low light according to it size. Try different sizes of LDR and you will figure it out.
Wow,simple and useful circuit
Dear bro,
Why you use 10k resistor? I want to control white led strip(4v). Can I control white led strip(4v)?
You can use with it 12 watts 12 volts DC bulb also. I have tried successfully.
Just want to ask sir. What if im gonna use any 12v led headlights.. what are the components adjustments to be use..?
3v white led is good?
Can you please explain how this circuit is working.
there is voltage divider with 10k and photoresistor
transistor haves 0.6v threshold, if base-enitter voltage is smaller it will not open
when photoresistor have no light, it increase ohms and voltage drop on it is higher, then transistor opens
if it have light, it have low resistanse and voltage drop
Can i use all this components with a 1.8 volt led instead of 3volt?
Can we use without resistance
No
I can use 10k replaced 2k
If I ned 12 leds to shine can I modify the cirkuit in some way?
replace led with led-wire ( found as Christmas battery led-wire . cut of 12 leds )
NICE😍😍
awesome man!!!!!! The diagram be nice thank you for sharing.
Take a look at the Pinned comment from DIY Show, I've added a Diagram.
Es ckt ko AC components me kar sakte h 230Volt
Can I use 3.7 battery
Yes I think , you can give it a try 😊
Thanks brother
Sir i did this with
bc 547
1k resistor
100 ohm resistor
3v led light
Ldr
Hiwatt battery
Sensor is not working light on directly what to do sir
Please reply
This is great! How can I modify this so that the light goes off after a set amount of time, lets say 6 hours... What do I need to add to this circuit to create that functionality?
you can use this circuit to switch on the timer circuit....
add capacitors
@@musicalrainbow5438 Thank you.
Ok for pilot projects.Will not work properly if light is changing slowly. Use a 555 of opamp for triggering at different threshold
how to adjust sensivity to light?
for example with low ambient light the LED be completly ON ?
Thanks.
Hi Hosein Goodarzi , just try adjust the resistor which connected to the base pin (the middle pin) of the transistor , replace it with a variable resistor :)
Try this circuit drive.google.com/open?id=1RDHIf5pWHxdee7DyUaPWujMtFJ4HyRdP
Thank you so much.
I will try it
@@diyshow888 is it working for 5V DC?
How much voltage and current does this circuit support?
9v
Very best project thanks for you sir
Thanks for your kind comment
sir battery if add 9 volt instead of 3 volt will it work plz sir reply
Will it work if I add a 9 volt battery?
Pls reply fast
good job 👍
Qual componente tenho que mudar para colocar fonte 12 v e ligar fita led
Sir apne base resistor kintne volt battery ke hisab se liya hai plz reply me
Want a video on 240v current circuit on this..
You have to do the Bridge rectifier. Search on youtube
I have a 10K resistor but not the 1K resistor would it still work?
yes
How many hours does it light up?
Work the circuit thanks 🔥
I tried this on my channel and it worked. The LED lights when light shines onto sensor
@OnboardingInformation Good job !
Hey, I wired my circuit like that but for some reason it will only turn off if I shine a strong light (such as my phone's torch) directly into the ldr. I'm making a card game board and I want the light to be off until the ldr sensor is covered by a card. ..so basically it's not working like yours. xD any help you can offer would be appreciated man
Hi Lord Weird, try adjust the value of resistance
Can u give me this diagram where the light is the last ti be added
Can use 12v
How can i get components at low cost
How about adding a small solar charger to the circuit??
Can i trigger a relay with this circuit?
We can use s9014 ?
What happens if I have a 10k ohm resistor and a 510 ohm resistor with a variable resistor
Resister n 1k at base of Transister not required just short it, Instead use 330ohms in collector in series with LED to prevent its failure while using it.
Does 2N3906 transistor is works for this project sir.
Can I use 18650 battery for input
How can we operate this circuit with AC supply
Can we use bc 548
V nice
what will happen if we put 12v in to it
can sensitivity of LDR be customised? Means at low or at high light?
YES
How can I get the sensor signal
attach to 3 9V batteries and touch it with your tongue
Would this work with a 7.4V batery and ofcourse a 7.4v led??
yes
Can u please give the circuit diagram for this prohect?
The light is always on how can i fix this? I used two same resistor
Is it important to use 2 resistors??
Yes
Battery kitne volt ki use ki aapne
El circuito funciona perfectamente pero ojo con el bc 547 hay que invertir el transistor como bien dice DIY SHOW
Sir, If I want to received light and LED is 1. What should I do
Can i use a mobile charger for electric supply?
i have all the materials but still unable to get it? i still get no light in dark but light on light
Hi you can fix it, please read pinned msg 😊
What do you mean face down? Opposite side of writing sorry just starting out
@@them.h6llentertainment266 Sorry, English is not my native language, I mean swap pin 1 and 3 if you are using BC547 (let the flat side face down) 😊
5V LED BULB Work...?
Maybe you can give it a try , adjust the parameters of the components and battery volt😊
Thank you sir
Can i use more led's and 12v dc supply?
yes
ruclips.net/video/AeXkGdFExVA/видео.html
How many volts is the battery?
3V
Nice project
Can we use S8050 Transistor
Tanks For 👍 👍 ❤❤❤❤❤
Bro mere pas BC557 transistor hai chalega
Bro, did you teach me how to make it well, Kareena Bal?
Good...how to use higher volt ?
Hi can you make a 12volts circuit. Using ic555 that will pulse every 1 minute. Working like a clock. Thank you
Hi Jason 'Jes' Mislang Honestly, this is a better idea than use LDR :)
But why 1 minute , not 12 hours ?
Please upload the circuit diagram for this
Yes plz
there are other ldrs where the bulb glows during the day and goes off at night . can u pls explain both the phenomenon
It would be great if you actually told us, how it works. As looking at it now, it is hard. I believe it does kinda "NOT" operation... and puts voltage into the LED only if the photo sensor is off. But not sure how exactly the current flows.
he made a mistake LMAO
he is unable to explain it he just copied it