What components is needed to buit a 4x4 keypad data logger. It must be small as possible to hide the circuit behind the 3 unused touch on 16 of the keypad.
Behind the others touch used (13) it's possible to hide the matrix keypad built with mini buttons interconnect by wire...
What components is needed to buit a 4x4 keypad data logger. It must be small as possible to hide the circuit behind the 3 unused touch on 16 of the keypad.
Behind the others touch used (13) it's possible to hide the matrix keypad built with mini buttons interconnect by wire...
