With an unlikely GFCI in the fan’s circuit main, this use of the ground wire could cause false tripping. Figure 2 This is the PCB layout for the circuit. Figure 3 Here is the completed board for this ...

It includes a slide-on base for easy mounting onto industry standard push-button shafts of through-hole or surface-mounted PCB-mounted switches. Advertisement By positioning the switch immediately ...

The switch circuit consists of two transistors, a comparator, a flip flop and a monostable. As you might expect, the button triggers the flip flops to turn the triac on.