Automatically illuminate the LED when A darkness appeards.. the sensor used in this project is an LDR

Resistors: 1K, 100K pot Transistor: BC548 LED: White Power: 9V Battery LDR: 3.7K (Ordinary LDR)

Connect the circuit as per the Circuit diagrum, when the circuit is in a dark atmosphere the LED turns glowing. The ciruit can be used as a dark room emergency.

note: 100K pot is used for the ensitivity adjstment, adjust the pot for better efficiency