Re: Keypad for Raduino...?

Arv Evans


Might work fine but one of my objectives is to reduce parts count to just what is
necessary for the functionality I want.
That is what drove me to using just one ADC input for the keypad.


On Sun, Jun 24, 2018 at 3:26 PM DuWayne Schmidlkofer <duwayne@...> wrote:
One of the easiest ways to do this might be to use a I2C expander
configured something like this board from Microchip
You could control the keyboard and display over I2C and free up the
existing display pins for other uses.

DuWayne  KV4QB

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