Does anyone know any really good tutorials/whitepapers/whatever on how capacitive touch screens work?
I don't need to design one, but I've got a 'puter with one that's susceptible to something one of my boards is doing.
-- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Wiki has a decent article on it. If you google for capactitive touch screen it comes up. Their article covers more than just capactive ones, there are different types for different aplications. Some are acoustic, some resisti ve as well as a few types of capacitive. I guess in that case unless it spe cifically says capacitive, don't assume. You can probably glean enough from the page to figure out what type of system it is without a stack of white paper.
Unfortunately I don't know of any tutorials.
I know how they work, having done some chip work in that arena... but I can't talk :-( ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
The cell phone touch screens are an array of horizontal and vertical "wires", queried in sequence, measuring the capacitive coupling thru your finger tip from a horizontal wire to a vertical one. ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
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