So I've decided to use an array of 12 -15 buttons on my project and detect the button pressed using the method found here: https://learn.sparkfun.com/tutorials/vkey-voltage-keypad-hookup-guide Basically, it's a voltage divider and you know which key was pressed by virtue of the voltage read in to …

Voltage range acceptance for a divider to detect keystroke

JugglingReferee April 11, 2014, 4:20am 5

Terrific info from many people.

Thanks everyone!