Touch Screen Demo Board

Abstract

This thesis work contains the planning of the demo board for the resistive panel type and also includes the schematic work for it. Usage in different environment is also studied to assess the behavior in real world usage. All common disturb-ances are included in the demo board feature list or at least the capability to create or add them is added. Software to demonstrate it on a PC display is also included

The resistive panel type was used due to it being cheap to manufacture and ro-bust in use. It does not support the multi-touch but the users do not normally need that feature. The target of this project was to make a working demo board for a customer to study the resistive touch screen controller. It gave the oppor-tunity to test it in real life and also allowed the customer to connect their own resistive panel. During the project, many new features were added in order to stress test the board and measure its real performance. A good overview was gained on how the different parameters affected the performance.

As the project progressed, many problems and drawbacks were encountered, but in the end, all of the obstacles were overcome. All the blocks that were de-signed for the demo board were tested with a real circuit. When the project was ready to enter the production phase, the actual printed circuit boards were ready to be orderd. Unfortunately, the project was canceled due to changing priorities and it never went into production.