We are trying to connect two Freeduino's with ATMEGA328P chipsets. Please see the attachment for pictorial representation. Connections Device 1 is powered by USB. Device 2 is not connected to any power source. A0 of device1 is INPUT_PULLUP, and connected to A0 of device 2. A1 of device 1 is OU…

Arduino Board Gets powered up from GPIO pin connected to another Arduino

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