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Hello all, I'm trying my hand at this for the first time with a bit of a background in circuits and such. I've been working on piecing together the Cornholio and I have a few questions about the schematic.
1. What does the circle with "pin" in it mean?
2. What does VC mean? I have been searching and just found that it indicates a voltage, is it just the +9 volts?
Thank you for any help!