Hey guys ,
In this project I am going to show you how to make a dark sensor using a single transistor and some few resistors in just 3 simple steps .
here is my video this is my old dark sensor


Step 1: Things You Need

1) 1x BC547 transistor 
2) 1x 220 k resistor
3) 1x 330 ohms resistor
4) 1- small perf board
5) 1x led (any colour )
6) wires
7) 9v battery 
8) battery clip
9)ldr(light dependent resistor )
1) soldering rod and wire 
2) wire stripper 

About This Instructable


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Bio: I am a 15 years old guy , I got interested in electronics from 6 th grade.
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