Monthly Archives: May 2005

These sensors work best as touch sensors, with the conductor embedded just below the surface of the object — for example, with the sensor underneath a cloth covering, cardboard covering, etc. The closer you can put the conductor to the chip that reads it, the better…. For this example, I used a QT113, but you can use the QT113H with the same circuit.Note: Digikey carries these sensors in the US, so there is no need to order directly from England.The wiring for the QT sensors is as follows: The connecting wire between the sensor and the pin is sensitive to touch as well. Continue reading →