How To Make A Dark Sensor On A Breadboard [HD]
ฝัง
- เผยแพร่เมื่อ 24 ส.ค. 2017
- 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
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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!
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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. 😊
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!!!!!!
hey this helped a lott but do you have the circuit diagram for it ????? cause i need it desperately.
Thanks Troy Araujo, you make it fun to follow for beginners with a nice calm voice. Just what we need. Keep going my friend.
Thank you for the tutorial!
Superb and clear English pronounciation 👌👌👌
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
Thank you very very much my project submission was next day
Thnx so much
😅😅
Best explanation
Thnx
Fully working project
Bro thamks for the video nice explanations I had tried but my led continuously blowing could u pls help me out this...
Thanks a lot...this video is really helpful. Thank you 😊
thx for the circuit!!!
Please do make more simple videos like this.
thank you for this informative video !!
can u please upload the circuit diagram of the dark sensor in which we used only 100k ohms resistor
What resistor would I use for a voltage of 3.3V?
Thanks bro it works and amazing
This channel is amazing
will it work if i use a 1K ohm resistor instead?
Thank you simple and it works
I need the working of the same exact circuit. Where can i get it?
Thank you so much, it worked for me!
Thanks, mine works but it only turn off in natural sunlight. Great work!
mine too
Thanks bro it was really helpful. 👍
I have a 270ohm resistor and a 1k ohm resistor. Will it work?
well done, simple and it worked
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
Exercise is exeelant. Thank u Sir. ..I'm following u👍
Thank you so much!!!
Hi! Can we more than one led and if so how to connect them
If 3v battery then we use what value of resistance
plzzz reply iwhat resistor i have to use 100k or ohm plz tell
I have a 1k resistor can it still work
Merci mais est ce que tu pourras le faire avec un buzzer
can you please provide the circuit diagram for this dark sensor??
Sir can you give the circuit diagram for these project?
could you please provide a circuit diagram for this....??
Can a photodiode replace the photo resistor?
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.
i want to use one more transisitor to attach more leds so can i
12v se connect kr ke,12v ke led ko automatically on off karne ka circuit digram bataye, kitne power ka resistance lagega,please
Tan q u a lott .............. itz working well... u gave a very good explanation once again .. tq
U r d best..i made dis..and its properly worked
Why are the positive and negative wires of the battery connected both to negative
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
How to hook a potentiometer to this exact configuration?
Bro would it work if i use 150k resistor?
So far The only Circuit That Worked Thanks Dude Life saver
It worked for me ... Thank u
Will bc 546 transistor work ?
i have 912 bc547 transistor and can it make this transistor???????
it works thanks bro ....
is there any way to do this with 1k resistors?
Thanks ❤
Good i make it, its working. Thankyou
Tq so much this is the only video working in the TH-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
Can you please share this sensor circuit diagram
Will this work with 3v
What is the concept or working of this circuit ,can any one explain?
Can we use 2n22222a transister
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
do you have a schematic diagram?
Bro! Thanks a lot!! This saved my life!! God bless you bro!!!
How many led connect with this circuit
Tnx for this video
May i ask for the diagram of this? Thank you
can i use bc 548 transistor
Which type of LED used in this circuit....can anyone help me out....I'm stock on this😞
Can I use other colors LED
Good Bro Excellent work bro .....helped alot
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
DO YOU HAVE THE SCHEMATIC OF THIS?
Will rock this one
Bro do the clap on off switch circuits in bread board
why mine not work???....mine when in the dark its not ligh...when in light its not light... can you help me?
cool this woked.thanks a lot.
can you please provide the circuit diagram
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
Thankz dude...
Literally , this was the most compact version of light sensor in the youtube
Where we get this materials
can i u se 10k resistor ?
can anyone give me the circuit diagram?
WELL DONE MY BRO
+Rohan bobby Thankyou! 😊
It cannot work for me the lightis on condition for me what can I do
What if we use 1k ohm 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?
Can I see the circuit diagram?
Nice.
Circuit diagram
?
it turned into light sensor...miracle😳
Yes
Bro could you provide the circuit of this one????
Can iam use 60 volt bulb
How a 100k resistor work?
Well done & explained.
+Ram Prabhu Thank you!
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
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
Can i use a 12v battery and 12 v led instead of 9v battery and led
Yes
Please provide the circuit diagram
Circuit diagram please
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
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?