Adafruit Neotrellis M4 Mainboard 8x8 case
thingiverse
It is of course possible to make a 8x8 matrix using 4 4x4 Neotrellis keypads, but then you still need a CPU to control it. But also the M4 (8x4) can be extended with 2 addiditional 4x4 keypads to create a 8x8 matrix, so you don't need an additional CPU anymore. This makes soldering and case easier. Here you can find a case, soldering instructions and a link to the software library to control it. Lasercut case for a Adafruit Neotrellis M4 Mainboard (8x4) with 2 additional 4x4 trellis keypads to make a 8x8 sytem. Following Adafruit material is necessary: - 1x Adafruit 3938 Neotrellis M4 Mainboard - 2x Adafruit 3954 Neotrellis 4x4 RGB keypad - 4x Adafruit 1611 Silicone Elastomer 4x4 Button keypad Next to that, you will need - a USB cable - 4x M3x18mm screws
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