I'm using python 3.4 to control the GPIO pins and using a GUI interface I made to interact with everything. I'm using a 16 channel relay to control some solenoids with the code. When I plug the 3v3 pin on the pi into the 5v pin on the relay the code works fine but the touch function of the touch screen stops responding. Mouse input still works fine. I need the touch to work as it will be the only input for the users.
I'm using a Pi b. My touch screen is the LANDZO 7 inch Touch Screen with 800x480 resolution.