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Touch screen Keyboard Answered

Hey :) i have a sweet idea of building a touch screen keyboard that's separate from the monitor. i kno their are already some on the market but it be way cooler if i could build one myself. after doing some research i found the easiest way with the most versatility would be to have a touch screen ontop of a display and have the display then attached to a chip which would relay the image of the custom keyboard. the keyboard then would be hooked up to the computer and would function like a normal keyboard but soundless. :D the problem in all this planning is 1 i don't know how to put everything together, even though Ive been reading up , my knowledge of hardware design is minimal and 2 i don't know how to write programs, but if its any consolation im teaching my self simple programming like C++ but i doubt that will help. anyways , any suggestions Thanks a million Justin


maybe if you open a keyboard there are 2 plastick cheets in it who sense the key pres maybe you could use that and put some paper on it with the buttons displayed good luck

Just do a search on instructables for "touch screen". A few will pop up. They seem to use a webcam to distinguish where the touch is. You might find some others which use a screen wire grid or some other way of getting input. The instructables will give you insight on how they translated the input signal. Good luck.

thanks :) , I looked and like you said most of them are using a web came. for this project , since its a keyboard , it would have to be thin, that why i thought of using a touch screen overlay; http://www.touchscreens.com/mt1415pc-usb-b.html or like this guy has done; http://www.youtube.com/watch?v=N8-BbOWVgXg. he placed the screen over the monitor. so the simplest way would be to have a visual display like an old monitor or small lcd one , that would display the custom keyboard ( changeable by a program perhaps) and then have the over lay above it.
before anything else i would need to build a input device , that would create the image on the lcd part before i get to the touchscreen.

any other suggestions?
Thanks again for the replies

I don't know how much resolution you need but look into conductive thread. Maybe you can lay it out in a pattern and follow the design like a fabric switch but use mylar or plastic sheets. It would be like looking through a window screen but you could crudely set up some sort of defined touchpoint grid. I don't know if real touchscreens figure out the change in capacitance somehow if you touch it as the trigger.