I want to have a halogen headlight that is normally steady with a button to make it flash.

I found a schematic here http://www.electronics-lab.com/projects/automotive/003/

the power source would be 10 AA NiMH rechargeable batteries, and the headlight would be a 25W halogen: http://www.foxelectricsupply.com/con...roductNo=LV505

I think this would work well with a SPDT relay with the power to the light going through the normally closed connection, so that the light is normally on, and then there would a be a momentary push button switch to turn on the LM555 and make the light start flashing, the button would be remote from the device and mounted on my handlebars.

I would need to make sure the pot would be able to dial in a rate of 4 flashes per second (legal rate specified by DOT for motorcycles)

I figure there would be 3 weather proof connectors required, one for the power, one for the remote switch, and one for the light. Maybe a switch to bypass the button and lock it in flashing mode.

If anybody has any experience with these kinds of circuits or any advice it would be greatly appreciated. I figure I'll test it out on a breadboard and then try to install in something like this: http://www.radioshack.com/product/in...entPage=family

or maybe I can find somebody who does this stuff as a hobby to just build the thing for me for a fee...