Dark sensor circuit (using transistor)- Easy tutorial 

Thanks man at last I completed my science project.Very good video and keep it up.

Nice DIY :)

you can use a 100k ohm pot to adjust the sensitivity of the LDR like I've used 😊

thanks maaaan it helped a lot

Very nice and easy

at first it was working as light detector then I switched the resistors and also the terminals of the led worked great

Hi, nice project, but I have one question, how can I connect multuple leds on this circut? I want to make a small Christmas-like village with lights in and out of houses (street lights) and I want them all light up when it is dark... Is it possible? I want to use 12V power supply. Can I somehow connect all LEDs paralel, and then connect them as one in this circut? And which resistors should I use? Thank you

Really nice! Can I use a 2n2222a transistor?

It works. How do I make it so that the LED gets either no current or the same current every time????

very nice

what resistor should be used for BC 548 transistor???

Can I use buzzer instead of led light???

can i use bc 546 or bc 548 transistor

can we make the circuit without resistors if using 4v battery

very nice video siddharth. but if want to add a buzzer in the circuit, how can i do that ??? plzz reply asap

will this circuit work if there r 2 220 ohm resistors only

I can use any npn transistor?ex;bd243c?

could you please explain this circuit?

circuit diagram??

Can you do it without breadboard?

Can we do this circuit without using bread board ??

I have 1k, 330 ohm and 100 ohm resistors. What should I do?

Could you pls give me the circuit diagram

please explain the working of circuit

Could you attach a motor to this circuit and if you can how ?

Bonjour, I am making a clock and i want this circuit but can i use a 3v instead 9v and let me about the resistors. Thanks, Imperial Recker.

i have built circuit as same as urs but its working as light detector circuit as the light gets off led gets off any solution ?

Can u plzz tell me how to reverse the polarities of the LED...plzz reply asap

My circuit is reversed i. e. LED is glowing in light condition & goes off in dark condition. What to do???

Sir, if we use more led 3 or 4 than the resistor value change or not if change what is value of resistor

Nice. Thanks i have now a Project. HAHAHAHA :D

Bhai circuit diagram dijiye

this circuit isint working. when i use two 220 ohm resistors

220k ,is it quater watt?!

ldr ohm kitna hai

" The middle 'most' leg " ?

can you show me the circuit diagram plz?

I need the circuit diagram please let me know where can I find it

not working please help

Can I run a motor with this circuit in place of the LED. If not, then please tell me how can I run it. please help

Can anyone help my led glows in the light and as I cover the ldr it dims and turns off!

what's the resistor needed for 100 led??? plz help

what is the voltage rating of the battery

See some near ont understanding

Got it working thanks to your diagram. In the video you put the LED in backwards.

help me it is not working the led is always on!!!for some reason

It is not working :(

Help it's just a light sensor

nhi chal rha

It does not work

not working please help