F1 Style Rear Blinker

FricFrac

OK am I missing something here? Is the idea to have the light blink in the simplest/cheapest method possible? If so (although I'm not a relay fan) then wouldn't a standard singal flasher relay be the easiest?

If you want a timer circuit to leave the light on for a period of time use a small cap across the gate on a FET. Once the cap discharges (and the stray capacitance discharges) the FET will shut off - quick and dirty (and cheap and simple too!). Just use a momentary switch to charge the cap up - pico farads will likely be enough unless you want a long on time.