Touch Screen Controller

For many years now, we have been using one version, or another of the STV3 tester.  For the purpose of providing simple control of the spin coater units, they have worked very well.  Unfortunately, the STV3 device is no longer in production, so now a new controller is needed.  Designing and developing a custom controller still proves too costly, so we have decided to employ an off-the-shelf touch screen LCD for the new controller.  Overall, the new touch screen controller works exactly like the STV3S.  In the future, we may enhance our firmware to make full use of the touch interface, but for now we wanted to keep the user interface as consistent as possible.