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How To Make A Simple Darksensor

Things you need:- A BC547 transistor  1-LDR (light depended resistor) 1- 100k resistor 1- LED  1- 220ohms resistor A small piece of protoboard soldering rod and soldering wire and some other common electronic items You can also make this as a light sensor I'll show it later Lets get started:- First you need to make sure which the emitter and the collector , so check the  data sheet  .

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