I'm using a CAP1188 (touch sense) from Adafruit as a touch controller for a video game. (UnrealEngine4 using UE4Duino plugin) It works fine when I don't have the game (or UnrealEngine) open...it is easy to control the sensitivity and get a reading in the serial port.
As soon as I do anything CPU intensive (play a video game, render something in 3D) the chip becomes VERY dulled...I have to literally touch the contacts directly to get any reading on it.
The weird thing is, I tried this on a very similar PC build and it only seems to be doing it on this particular machine....but I need to use this PC for this particular project.
Any trouble shooting ideas to keep the sensitivity the same no matter what the CPU is doing?
Some things I tried:
-powered arduino separate with 9V supply and left the USB in (I think then it would take power from 9V and just use USB for serial readings). This improved things ever so slightly.
-I'd like to decouple it but I'm not sure how. Just put a .1uf in between the cap1188 vin and gnd? or i assume it's already decoupled?
-used a usb cable with a choke...no difference.
Thanks for any help!