I want to put strobing auxiliary stop lights on my motorcycle. They make a self-contained set that is powered by the brake light circuit of the motorcycle. The problem is as long as the brake light is lit (like at a stop light), the strobes keep going. Certain states have rules about how long stop lights can strobe. I was wondering if I could find a circuit that could allow the strobes to flash for a pre-determined time limit and then stop even though the circuit still had power. The timer would start again when the 12 volt stop light power is stopped and started again. It would be nice to be able to vary the length of the duty cycle. Thanks.