How can i make a circuit to flash alternating LED bulbs?
Here's what im looking to do: i want to set up my plow truck with tow-truck lights, like i've seen on "Operation Repo". Each of the 4 marker lights would have about 10 LED's housed inside the lens, and they would alternate flashes. opposite corners would flash at the same time, and the 2 pairs would alternate in a AA-BB-AA-BB-AA-BB-AA-BB fashion. its a vehicle, so i would obviously want it to run off of 12vDC. the circuit needs to be controlled with a simple "On-Off" toggle switch. the circuit also needs to be simple, and fairly inexpensive. i can BUILD any circuit you want, but i really have no idea what im doing when it comes to designing.
Long story short, here's what i need:
-40 LEDs, split into 2 alternating groups
i KNOW someone out there can do this crap in their sleep, and help would be greatly appreciated. ive looked all over, and cant seem to find a schematic or anything close enough to be adapted.
just to be clear... im looking for a strobe effect, moreso than a slow blink. the truck has blinkers... im looking for attention-getting strobes