3 touch buttons using RCin

[Yves]

Hello all,
I needed to make an apparatus that is splash proof. I had to do a touch button key board. I know they are available but I have designed my own.
I found by using two sticky copper foils sandwich with a thin polyethylene film which have on top a the thin sticky face where the labels are printed. It works like a charm. (See the exploded diagram). To calibrate the threshold signal I used the free PLX-DAQ_R2.xlsm from Parallax. I thought it may be useful if you don't want to use a keyboard with fewer buttons or not using mechanical buttons. I'm sure some of you will write a smarter code but as long it works. I know the are some pics which have a touch button but the present code will work with any pic

Yves