@dennish posted:...Latest project - adding LED's to the Williams EZ Street police car!
... I am running them off of a DC power source for the flashing LED.
So we're all on the same page, you have this:
Can you tell us what flashing LED you have?
You say the circuit tested "fine" on the bench. By circuit you mean the 5 LEDs connected in-series? And the head/tail lights maintained constant brightness even when the strobe LED blinked?
Do you have a photo of the guts of the car? I'm curious available space to add more "stuff." With a motor, gear transmission, and probably a diode or bridge rectifier to allow AC operation, there may not be much room for adding a voltage regulator, capacitor, or whatever.
As for the variable voltage, I'd think you'd want to be able to adjust speed and maintain constant brightness or something close to constant brightness. If this is what you want, have you experimented to find what range of DC voltage you see operating the car at? This range of voltage will dictate the type of circuit needed.
