Chris Crumpacker has been experimenting with a cute 3×4 matrix keypad:
He’s got it working not only with just the GPIO pins, but also with a port expander, thus saving a lot of pins. The whole blog post, including Python examples can be found here
Chris Crumpacker has been experimenting with a cute 3×4 matrix keypad:
He’s got it working not only with just the GPIO pins, but also with a port expander, thus saving a lot of pins. The whole blog post, including Python examples can be found here
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