Police Car Led Effect Using 555 Timer IC


Components Required

  1. 6 x RED LEDs
  2. 6 x Blue LEDs
  3. 2 x 555 Timer ICs
  4. 2 x 1K Resistors
  5. 1 x 680K Resistor
  6. 1 x 100K Resistor
  7. 1 x 10uf Capacitor and
  8. 1 x 100nF Ceramic Capacitor (104)

How The Circuit Works

Now, let’s try to understand how this circuit works.

  • Part 1: Where the Blue and Red LEDs alternate and flash at a regular interval
  • Part 2: Where a cluster of similar color LEDs flash like a strobe light

Demo On Breadboard

The Board


Final Demo




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