Sunday, October 19, 2008

Breadboard test of capacitive sensor module

Due to frequent useage of capacitive sensor among my previous projects, I decide to toolize and modulize it as part of my own toolkit development(coming soon). Basically, this sensor consists of a QT118H chip, a 0.1uF50W capacitor, a 470K resistor and an LED for feedback signaling. The circuit showing on the breadboaed test is described on the datasheet of QT118H. In the movie below, you can see that this circuit successfully lighted up an LED while the finger touched the copper pad.


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