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=== Capacitive Sensor === | === Capacitive Sensor === | ||
− | + | These measure capacitance, but normally this is the means to measuring something else: for example moving your hand close to a metal plate increases its capacitance to ground. Measuring the capacitance thus measures the the touch ( or near touch ). Two insulated electrodes on either side of a glass tube can detect the presence of water in the tube by the change capacitance. | |
* [http://www.unorthodox.com.au/wiki/index.php?title=Touchpad_Project_0.9.7 Unorthodox Engineers: "Touchpad Project"] is an open-hardware cap-sense device with a 4x5 node grid of plates. Is it a [[sensors#multi-touch sensor]]? | * [http://www.unorthodox.com.au/wiki/index.php?title=Touchpad_Project_0.9.7 Unorthodox Engineers: "Touchpad Project"] is an open-hardware cap-sense device with a 4x5 node grid of plates. Is it a [[sensors#multi-touch sensor]]? | ||
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''Is there any difference between a "E-Field Sensor" and a capacitive proximity sensor?'' | ''Is there any difference between a "E-Field Sensor" and a capacitive proximity sensor?'' | ||
− | Some kinds of capacitive sensors can be used as [[sensors#multi-touch sensor]]s | + | Some kinds of capacitive sensors can be used as [[sensors#multi-touch sensor]]s. |
* Photos tagged "capsense" on Flickr: [http://www.flickr.com/photos/macetech/tags/capsense/]. | * Photos tagged "capsense" on Flickr: [http://www.flickr.com/photos/macetech/tags/capsense/]. |