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AndroPod’s 3-way jumper

E-Labs Inside section

AndroPod’s 3-way jumper
The Elektor AndroPod is our command interface to allow an Android phone to communicate with other circuits. One of its notable features is the variety of power sources possible: USB device, UART, debugging module, RS-485 module. That sort of flexibility involves something of a challenge for the designer: how to avoid power supply conflicts without resorting to expensive mechanical components?
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