1. The problem statement, all variables and given/known data Arudino (UNO) is a Microprocessor. As 13 I/O pins and 8 digital pins and 6 PWMs. 2. Relevant equations 3. The attempt at a solution the problem is I don't know how I can power it. I don't think the digital I/O plug can be used as a power source. So I don't know where the I/O pin 12 would go as well as where it would connect, with the resistor , along the circuit. Or How I can power the Arudino. Any Suggestions?