Yellow Cola

Project Number: 65

Description: Replace the red LED (D1) with the yellow LED (D5). Compare the LED brightness and the voltage change to the red LED in the preceding project. The liquid energy source does not produce enough electricity to run the W1 horn or the M4 motor.

Snappy: The yellow LED needs a higher voltage to turn on but it can get brighter. If you had pipes pumping fresh cola into the liquid cells and then removing some of the liquid, then the LED would stay lit as long as the flow was maintained - it would be a fuel cell.