In the mean time, if you're interested in solidly-designed and open-source arduino clones, you can check out those over at Olimex: https://www.olimex.com/Produ

In the mean time, if you're interested in solidly-designed and open-source arduino clones, you can check out those over at Olimex: https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-32U4/open-source-hardware https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-32U4/ope... https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-328/open-source-hardware https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-328/open... The second one has a better voltage regulator (9-30V input) and higher safe temperature range.