This is my first time trying something that's directly connected to the mains. I'm building this to add in to my dispenser controller. The 6 pin header near the DIP switches and microcontroller are just a programming header for the ATMega. The always on 120VAC is the trace that runs along the top of the board, and is pin 1 on the two screw terminal blocks at the top left. Pin 2 on the terminal blocks is switched hot. Pin 3 is the neutral, and reference ground within the circuit. I used both the top and bottom layers to connect the two screw terminal blocks to maximize current carrying capabilities.
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