QT113H - ETC

QT113H CHARGE-TRANSFER TOUCH SENSOR

QProx™ QT113 / QT113H CHARGE-TRANSFER TOUCH SENSOR ! ! ! ! ! ! ! ! ! ! ! ! Projects a proximity field through air Less expensive than many mechanical switches Sensitivity easily adjusted via capacitor value Turns small objects into intrinsic touch sensors 100% autocal for life - no adjustments required 2.5 to 5V, 600µA single supply operation Toggle mode for.

Features

and sensitivity. 1.3 ELECTRODE DESIGN Figure 1-2 Internal Switching & Timing ELE C TRO DE R esult 1.3.1 ELECTRODE GEOMETRY AND SIZE There is no restriction on the shape of the electrode; in most cases common sense and a little experimentation can result in a good electrode design. The QT113 will operate equally well with long, thin electrodes as with round or square ones; even random shapes are acceptable. The electrode can also be a 3-dimensional surface or object. Sensitivity is related to electrode surface area, orientation with respect to the object being sensed, object composition, and.