I'm still looking for a solution to this. I changed AC/DC converter for this one https://www.banggood.com/fr/5Pcs-AC-DC-Isolated-AC-110V-or-220V-To-DC-5V-600mA-Constant-Voltage-Switch-Power-Supply-Converter-p-1144708.html?rmmds=myorder&cur_warehouse=CN with no change in behavior. What I did though, ...

Hi folks, I couldn't find proper documentation regarding the behavior I'm observing. Basically, my touch sensor is working just fine when tested with USB power, but if using a AC/DC 5V converter on Vin, readings seem to be erratic. It seems to me it is caused by the lack of actual ground on the circ...