I took this little remote controlled RGB LED circuit out of a fake candle and want to re-use it to drive several RGB LEDs.
The LED on the circuit is common anode and I'm using common anode as well.
The circuit is designed to drive one LED, so simply connecting 10 to 20 additional LEDs will probably ruin it as it would draw a lot more current.
So my idea was to remove the LED from the circuit and use the power that it's getting from the remote control circuit to switch transistors (one per color) on my circuit that switch my LEDs.
However, I can't figure out how to achieve this.
If it were a common cathode LED, I would simply connect the cathode to ground and connect each color anode to the base of a transistor, but I don't understand how to do this with the LEDs being common anode and the color pin being negative voltage.
In the example circuit, I focus just on one LED color (let's say the Red ones). If anyone can explain me how to switch D1 - D10 in my circuit using the Red cathode on the remote control circuit, that would help me out.