Hi, I had an Arduino Nano v3 hooked up to an LCD display and a servo driver from RobotShop. I was powering the whole arrangement using a 12V DC supply that fed into both the Arduino's VIN and the input to the servo driver. This is all on a printed PCB. Everything has been working just fine, but af…

Safe to connect both VIN and a USB connector?

fungus April 3, 2014, 1:54pm 2

Were all the GNDs connected together?

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