Chapter 8. Touch Control Panel

Small four-wire resistive touch screens are now amazingly inexpensive: they are produced in such enormous quantities for mobile phones, PDAs, and particularly handheld games such as the Nintendo DS that they can be bought brand new for under US $10.

Larger touch screens are also rapidly falling in price. The popularity of netbooks with screens between 7 and 10 inches in size has resulted in a healthy market for touch screens that can be retrofitted to them and plugged into an internal USB port. Despite the fact that they come with control electronics and a USB interface, those screens are also predominantly four-wire resistive devices, so if you dump the control module that comes with them and interface to the screen ...

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