A quick Pibow mod to embed Adafruit’s Trellis nicely. Slight port of Adafruit’s Arduino code to show the lights working. The Green LEDs are far too dim. I know this. They were the ones I had to hand for testing
Trellis is an open source backlight keypad driver system. It is easy to use, works with any 3mm LEDs and eight tiles can be tiled together on a shared I2C bus.
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