I have a Brookstone rover 1.0. In the app, you can trigger an IR LED to go on. I have also installed lights in the front and back of the rover in a simple LED series driven by a resistor connected directly to the battery.
I was thinking it would be possible to use discrete components such as a few transistors to trigger the LEDs to go on when the IR is off. The IR LED is connected to GND (this much I know), and when the microprocessor sets the pin to high the led goes on as the circuit is completed (this I am assuming). I have no way of accessing the code, and changing the procedures.
Is there a way to trigger a transistor as a switch so to speak to make the LEDs go on, when the IR is off (i.e. when there is no (+) going to the IR) and vice-versa?