I am working on a QTouch project having 12 buttons working on mutual capacitance principle.
For this I am using ATSAMD20J18 microcontroller and PTC library.
I have designed a double sided PCB as required for mutual capacitance application. I have attached the project summary screenshots of QTouch project builder and the PCB designs in this post. Pls have a look.
Problem is when I press a button, other buttons get activated simultaneously. I am using 3 mm acrylic sheet as a touch surface.
I have attached additional grounded blank pcb below tracks side after inserting insulation between them for noise suppression. But not getting +ve results.
Thanks in advance.