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Forum Index : Microcontroller and PC projects : I2C 6x5 (or 6x6) keypad pcb

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zeitfest
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Joined: 31/07/2019
Location: Australia
Posts: 626
Posted: 03:37am 24 Apr 2024
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I have some spare pcb's available if it helps anyone.
It presents a 6x5 arrangement of tactile switches (with an optional 6x1 stripe auxiliary), with a Adafruit TCA8418 module connected on the back A simple QWIIC socket connects to a I2C bus. It works with eg a quick ino from adafruit.
Hardly novel but it might help avoid some hackwork. The labels are padded for comfort.
(More details on my programmable calculator thread.)

The front, with a sdmicro for scale, next to a resulting keypad:




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