hunzai said:
Hi,
Is there any way to build simple touch screen mechanism for graphic or
alpha numaric LCD screen that is interfaced with microcontroller.
regards
Hunzai
NO!
What are you trying to accomplish?
When you say "build", what do you mean?
What do you mean by touch? Finger? stylus? For a small display
a finger might be too big. The technology used may be critically
dependent on what you're gonna use to "touch" it.
The bottom line is that while conceptually simple, it's unlikely
that you could build one for less than what it costs to buy one.
When you say "alpha numeric", I infer that you need less than full
position reporting. If all you want is selection with soft buttons,
one way is to position a line of buttons under the display with
labels that are dispayed above on the LCD. You have context sensitive
buttons without any touch input at all.
If you have the ability to deposit transparent conductive material on
plastic, you have a lot of other options. If that material happens to
be uniformly resistive, you have more options.
Then there are other technologies. All simple conceptually, but
requiring specialized equipment to fabricate.
What you do depends a lot on what you're trying to accomplish.
mike
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