Hi I've wanted to make a smarter LCD piggyback board that would also handle the 5x4 keypads for some years and I finally got around to it. This board is a minimal design, Atmega328 using internal 8Mhz oscillator, features include DC piezio, variable control of contrast and Backlight. Connect via I…

arduLCDkeypad - Atmega328 LCD piggyback board (I2C and Serial)

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