How does flashing bicycle lamps work?

**BergaLiden** · 05-17-2009 07:55 AM

You know those that you can first choose to have fully lighted, and then if you press the button again, it starts flashing. How does that work actually? How come it's not just On/Off, if you know what I mean?

Quick responses would be appreciated, I have a presentation on this due tomorrow,

xoxo

**bakersfield90** · 05-17-2009 09:56 AM

Magic?

**msk** · 05-17-2009 10:30 AM

Instead of just using a switch, battery, and bulb, which would be the simplest design, the flashing lights use a battery, LEDs, and a circuit board that controls the timing. Here's a few basic circuits:

Simple LED flasher circuits