The flasher circuits below operate on a single 1.5 volt battery. LED flasher circuit diagrams The circuit on the upper uses the popular LM3909 LED flasher IC and requires only a timing capacitor and ...

This is probably the simplest idea to generate flashing light from an LED using AC. The circuit is relatively the simple way of flashing one or more LEDs from a high voltage DC obtained from Mains.

LED flasher circuit With cycling safety in mind, I bought a pair of low power red LED things that replace the bungs in the end of drop handlebars. They are a neat way to get a bit of extra visibility ...