Touch Screen Controller

For many years now, we have been using one version or another of the STV3 device.  For the purpose of providing simple control of the Spin Coater units, they have worked very well.  Unfortunately, the STV3 is no longer in production.  Designing and building a custom controller still proves too costly, and unnecessary for that matter.  As such, we decided to employ an off-the-shelf 3.5″ Touch Screen LCD for the new controller.  Overall, the new touch screen controller works exactly like the STV3S, but has a much bigger and clearer display.  In the future, we may enhance the firmware to make full use of the touch interface, but for now we wanted to keep the user interface as consistent as possible.