Capacitive touch switches work by measuring the change in capacitance of a PCB (printed-circuit-board) pattern depending on the placement of a user’s finger over a sensing pad. Capacitive switches are ...

Designers seeking a quick and easy frequency source often use a relaxation oscillator (Fig. 1) based on digital gates such as the 74HC14 inverter with hysteresis. The oscillator is also useful in ...

A relaxation oscillator is an oscillator based upon the performance of a physical system’s resending to equilibrium after being disturbed. It is a dynamical system within the oscillator continuously ...