I have a RGB LED strip (Common +) that I want to drive using a controller that expects the strip to also have a W (White) channel.
So what I am basicly looking for: As soon as the controllers W output is HIGH I want all three R, G and B inputs on the strip to be driven HIGH.
How would I realize this? I could insert diode's between the RGB lines and connect the W output of the controller to all three strip inputs, but then I would have a voltage loss.