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  .           
