12V LED Flasher

This circuit is designed to flash an LED at a constant rate
and could be used to give the appearance of an active alarm system
in a car.

Parts list

  • C1 220uF capacitor
  • LED
  • IC LM3909 Flasher
  • R1 3.9K 1/2 watt resistor
  • R2 1.0K 1/4 watt resistor