I have an Adruino Mega2560 with Ethernet shield and two Nano's all connected to each other through I2C. The power supply comes from a 12v DC source which is put through a 9v regulator to power the boards via Vin. When I power the Maga through its USB and the Nano's from the 9v everything works perf…

Strange power problem

Noobian September 10, 2017, 7:20pm 2

Tried running from the 12V directly? Also did you swap power inputs while the Arduinos were running?

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