An Arduino UNO Flash and RAM update with the ATmega2560 as DIL 28 variant.
Project showcase by T.F. Mc Temucin
It is a device that measures CO2 levels, inside and outside temperatures, and humidity.
Project tutorial by Anton
I never needed pins anymore. The only thing I was thinking about is the possibility to use the pins for QX1 and QX2 (quartz) as Serial 2. I could still place the quartz on the underside as smd. But the production is just too expensive. But so far it has been proven that the board is 100% compatible with an original UNO.
Respect ... verry nice.
Sorry ..... it was hard to work. Fell later.
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