LED circuit diagrams

Push-bike Light

Automatic switch-on when it gets dark. 6V or 3V battery operation

LED Flasher

This LED flasher circuit uses any DC supply from 3V to 12V. Flash rate is controlled by R1,C1 and R2,C2. Larger values create slower fash rates, smaller values higher flash rates.

Programmable LED Flashers

Two simple, wide supply range operating circuits.

LED or Lamp Pulser

Astonishing effect. 4.5V supply

Halloween Flashing-eyes Badge

Two-LED-eyes follow the rhythm of music or speech. 3V Battery-operated device suitable for pins or badges