I'd like to modify a color changing candle (example) circuit so it can be turned on without lighting the actual candle. It uses a photodiode and a optical fiber alongside the wick to cycle the RGB LEDs as long as it's burning.
I've found out I need to supply about 30 uA with a external power source (another 3V battery with a 100k resistor) to the PD leads to substitute its function in the circuit. Sourcing current from the two CR2032s to the PD doesn't work.
Is there any easier modification without the need of a external power source?