Delay Timer Circuit

Friends this is very easy circuit for staircase light , light will auto off after some time . Actually this is a simple delay timer circuit based on transistor BC547 if you want to light for extra time use 2200uf capacitor instead 1000uf

  • Parts List:- Transistor BC547
  • Relay 12 Volt
  • Resistor 22k , 1k 1/4watt
  • Capacitor 1000uf/25volt
  • LED
  • Push to on Switch

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