How To Make A Dark Sensor On A Breadboard [HD]
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- Опубліковано 14 жов 2024
- A 'Dark Sensor' is a device which senses the presence of darkness. It senses the presence of darkness with the help of the LDR. Whenever light is focused on the LDR...the L.E.D will not glow. As soon as you cover the LDR or keep the dark sensor in a dark room without lights...the L.E.D will glow.
It can also be called an "Automatic Street Light" Circuit since the L.E.D will come "on" after sunset i.e when it becomes dark and the L.E.D will turn "off" during sunrise because there's light! 💡
Electronic Components Required:- LDR (Light Dependant Resistor), L.E.D (Light Emitting Diode), 100k ohm resistor, 9v battery with battery clip, BC547 Transistor, Breadboard and some wires.
First connect all the elements on the breadboard to check if it works and then you can solder it to make it permanent. You can even attach a switch to the "Dark Sensor" to turn it "ON" and "OFF" when required.
Steps of construction:-
1.Connect the LDR to the 'base' and 'emitter' of the BC547 transistor.
2.Then connect one end of the 100k ohm resistor from the 'base' of the BC547 transistor and the other end of the 100k ohm resistor to anode (+) side of the L.E.D.
3.The cathode (-) side of the L.E.D will get connected to the 'collector' of the BC547 transistor.
4.The positive (+) side of the battery will get connected to the 100k ohm resistor and anode (+) of the L.E.D while the negative (-) side of the battery will get connected to the 'emitter' of the BC547 transistor and the other end of the LDR.
IF YOU DONT UNDERSTAND THIS; MAKE SURE YOU WATCH MY PREVIOUS "DARK SENSOR" VIDEO'S
LINK :--- • How To Make A "Dark Se...
LINK 2 :--- • How to make a "Dark Se...
LINK 3 :--- • How to make "Automatic...
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I have explained the circuit construction on the breadboard. Once you get the circuit right you can solder it to make it permanent. Your "Dark Sensor" is ready. Any queries then please do ask!
Thanks for watching. Don't forget to like/subscribe/comment/share. 😊✌
![How to make a Laser Tripwire Alarm Circuit on a Breadboard [HD]](http://i.ytimg.com/vi/ZIwBVln4cgQ/mqdefault.jpg)
Superb and clear English pronounciation 👌👌👌
May Allah bless you man. I am working on a lab I have to demo tomorrow morning, and I came across this. Thanks Very Much. You don't know how much I grateful for you.
Deserved Subscription and Like!!!!!!
Perfectly works... thankyou so much
This was the most easy and simple circuit I’ve seen so far and one which works too. Thank you so much. I hope my viva goes well tomorrow. 😊
Thank you very very much my project submission was next day
Thnx so much
😅😅
Best explanation
Thnx
Fully working project
Thaks this works. Great explanation. ❤from sri lanaka.
hey this helped a lott but do you have the circuit diagram for it ????? cause i need it desperately.
Thanks dude, your work is the best life saver👍😂😊
Tq so much this is the only video working in the UA-cam
I got full marks in my project by doing this
Tq so much
Tq very much
Really thankful
Wow that's amazing! Congrats! I'm glad you found my video useful! 😊
#pleasesubscribe
I've seen many videos on this but no one explains why you use the 100K Ohm resistor. Can you explain?
True, when I had only 1k, it didn't work. When I replaced with 100k, it worked perfect
Bro thamks for the video nice explanations I had tried but my led continuously blowing could u pls help me out this...
Can I get a circuit diagram of it sir ,, please reply fast
can you please provide the circuit diagram for this dark sensor??
can I use 1k resistor instead of 100k resistor
Will it work without the transistor? I have seen simple circuit diagram without the transistor consisting just a battery, wires, a resistor, LDR and LED
Can i use a 12v battery and 12 v led instead of 9v battery and led
Yes
Merci mais est ce que tu pourras le faire avec un buzzer
I have a 270ohm resistor and a 1k ohm resistor. Will it work?
when doing like this, can I use a 5V battery?
Hello, I used a resistance of 22 and a voltage of 5, is this correct Because it didn't work for me
How would I go about using an LDR, like you have on this breadboard, to power a 12volt relay.?
The second question is, How would you wire this to activate the relay, when the LDR senses light and shuts the relay off when the LDR senses no light? Thank you
Can a photodiode replace the photo resistor?
I have a 1k resistor can it still work
I made all of the connections and made with the same components, and it is working the opposite; when light is on it, it lights up but when the light is off, it doesn’t light up, can you please help me quickly
Thank you
I figured out that I was putting the cathode of the led in the base, but when I plugged it in the collector it didn’t work at all
Please answer me
Thanks, mine works but it only turn off in natural sunlight. Great work!
mine too
I tried to make this but got only a voltage diff of 0.02 V bw the led pins in light and dark.
Even tried 2N222 but nothing.only 0.2 V diff.
I used
BC557 and changed the polarity accordingly
Moreover my LDR works kinda weird
It is 0.5 M Ohm in light
And 0.3M Ohm in dark
Is it possible??
I even tested my multimeter and found it to be working correctly.
Hi! Can we more than one led and if so how to connect them
it's working totally reverse what can I do
Same
Thamula - It may not actually be reverse. Try shining a bright flashlight on the LDR to see if that turns off the LED. If the LED turns off, you created the circuit correctly.
I have tried SEVERAL “dark detector” circuits, and they ALL have this problem (at least for me). I am going to try a 100 K potentiometer in series with the 100 K resistor to see if I just need more resistance in the circuit.
Please let me know if the flashlight turns off your LED. Good luck!
Thumula - I replaced the 100K resistor with a 680K resistor, and now it works! The LED still has a VERY small illumination in a dimly-lit room, but the LED lights up perfectly in darkness. I may try a 1M resistor to see if that helps.
so 100k ohm doesn't work? my circuit worked the last time I did it, but it is now reversed.
Check the ic polarity
So far The only Circuit That Worked Thanks Dude Life saver
well done bro........it's working Vera level .......👍👌👍👌👍👌👍👌👍👌👍👌👍👌👍👌👍👌☺☺☺☺☺☺
it turned into light sensor...miracle😳
Yes
If 3v battery then we use what value of resistance
Sir isko on off button kaise laga sakte Hai????
Plz reply me please it is urgent
You will have to connect a micro switch. Watch this video to understand 👉ua-cam.com/video/rdhebFue4CY/v-deo.html
plzzz reply iwhat resistor i have to use 100k or ohm plz tell
Why are the positive and negative wires of the battery connected both to negative
Will bc 546 transistor work ?
Good Bro Excellent work bro .....helped alot
Thanks Troy Araujo, you make it fun to follow for beginners with a nice calm voice. Just what we need. Keep going my friend.
Hiii i actually tried this and it was very helpful but it also lights up even when exposed to light i dont know whats wrong.
Me too. Why huh?
If the resistance in LDRs increases with darkness then doesn't that mean that the LED is going to switch on when there's light in the enviroment? I've seen this circuit in other videos and I'm still confused about that
More light = more resistance
Which type of LED used in this circuit....can anyone help me out....I'm stock on this😞
why mine not work???....mine when in the dark its not ligh...when in light its not light... can you help me?
i have 912 bc547 transistor and can it make this transistor???????
very clearly explained dude.....and i could understand very well...keep it up bro!!!
Thanks bro! :)
@@TroyAraujo sir is circuit ko on off button kaise laga sakte Hai???
Please reply me sir please 🙏 🙏🙏🙏🙏🙏🙏
@@TroyAraujo please help me sir
What is the concept or working of this circuit ,can any one explain?
I am a beginner, at first it didn’t work but since I use arduino I realized it has to go from negative to positive because your using a battery and it worked!
Edit: I mean like I didn’t realize I was putting it wrong I know it goes from negative to positive
CAN I USE THIS FOR MAKING A SMART STREET LIGHT...FOR MY SICENCE FAIR BRO
+Rohan bobby Yes sure bro! Good luck with your science fair! 👍
thx bro
can I make by 1k
can anyone give me the circuit diagram?
Literally , this was the most compact version of light sensor in the youtube
can we use any breadboard ?
Yes
I have seen many videos..this is the best..worked properly
+MALVINDER SINGH Thanks bro! ☺
Mines not working, LED is ON but it doesn't turn OFF in light
Bro do the clap on off switch circuits in bread board
will it work if i use a 1K ohm resistor instead?
Give the circuit diagram
I think the guy did it not to work and when people watch again and again to figure out he gets his viewers number. To me when I changed the resistor from 100k to 1 M , it worked. I used 1M because I have no less resistor than that and more than 100k😊
not working this circuit
Thanks bro it works and amazing
This channel is amazing
can u please upload the circuit diagram of the dark sensor in which we used only 100k ohms resistor
My circuit is not working properly, as my led is switching on as soon as i connect my battery, i dont know why ldr is not working or there is anyother problem. Can anyone please help me with this?
thank you for this informative video !!
Circuit diagram please
i want to use one more transisitor to attach more leds so can i
I need the working of the same exact circuit. Where can i get it?
Thanks a lot 🙌this video is really helpful. Thank you 😍
Well done Professor
Good i make it, its working. Thankyou
12v se connect kr ke,12v ke led ko automatically on off karne ka circuit digram bataye, kitne power ka resistance lagega,please
I do not have an 10k resistor. Can i use some other value resistor
+Deepak Prajapati Don't use 10k resistor....use 100k resistor!
Troy Araujo hello i use 100k but it not work
Which is longer the anode or the cathode??
Please reply quickly
Anode (+) is longer than Cathode (-)
Troy Araujo thank you
May i ask for the diagram of this? Thank you
Bro would it work if i use 150k resistor?
Can we use 2n22222a transister
Plz give a circuit diagram
please put an video on how to make an automatic Street light control system....
+David Don Hey bro! I've already made a video on Automatic Street Light.... You can check it out here :- ua-cam.com/video/c0bsQer6KTs/v-deo.html
Exercise is exeelant. Thank u Sir. ..I'm following u👍
It cannot work for me the lightis on condition for me what can I do
Plz explain the theory why this system works in dark and why not in light condition....??? Plz tell.. i have to analyse my teacher...🙏
Will this work with 3v
do you have a schematic diagram?
Thank you simple and it works
Tan q u a lott .............. itz working well... u gave a very good explanation once again .. tq
Sir can you please provide the circuit diagram 😒
Yarrrrrr apnay ne hmari zindagi badal di
Can I see the circuit diagram?
Where we get this materials
U r d best..i made dis..and its properly worked
What if we use 1k ohm resistor
It can work on 1k ohm resistor?
You can try... But mostly it works only with 100k ohm resistor.
Where is the diagram I need it quickly
Can I use other colors LED
Thank you so much, it worked for me!
IF NOT CAN YOU PLS SHOW ME HOW TO MAKE A SMART STREET LIGHT USING LDR
+Rohan bobby I have already made a video on Automatic Street Light. Watch it here :- ua-cam.com/video/c0bsQer6KTs/v-deo.html
thx bro
How many led connect with this circuit
thx for the circuit!!!
Please do make more simple videos like this.
Did eveything didnt work any tips ?????
Can you please share this sensor circuit diagram
is there any way to do this with 1k resistors?
Please provide the circuit diagram
can i use bc 548 transistor
How to hook a potentiometer to this exact configuration?