Hi,
I am building a custom MIDI pedalboard. I am successfully de-bouncing 6 MOMENTARY DPDT foot switches using a MC14490 IC (6in 6 out debouncer with a 391 capacitor on clock - tested on digital ports 2-7 on my arduino mega-not one line of software debouncing code and works 100% 24/7). My serial monitor returns button number each time i press one of the DPDTs. My problem is that i need 22 DPDTs and some other things on the arduino, even the 54 pins of a MEGA are not enough...
Can I use a couple of CD74HC4067 I have (http://www.farnell.com/datasheets/1763986.pdf) to read which one of the DPDTs is pressed? If not any suggestions?