3 neat ATXmega prototype boards

This time i present three neat prototype boards for Xmega processors, in the Xmega A4 (44pin), A3 (64pin), and A1 (100pin) versions, compatible with all of the models of each family. The PCBs are designed to put with one or both sides in the breadboard, they are small and compact so they doesn’t occupy much space, with on board: PDI programming interface cnnector, USB connector (for devices in “U” version with support for high-speed USB), uSD socket, buttons, which are just a basic add-ons.

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