rajkot

Sunday, February 7, 2010

AUTOMATIC LED EMERGENCY LIGHT


  • This is the circuit diagram of a low cost emergency light based on white LED.The white LED provide very bright light which turns on when the mains supply is not there.
  • The circuit has an automatic charger which stops charging when the battery is fully charged.
  • The IC LM 317 produces a regulated 7 V for the charging of Battery.
  • t is always better to connect a heat sink with BD 140.Before using the circuit out put of LM317 must be set to 7V by adjusting the potentiometer.

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