Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I ...

Actuating a momentary (ON) push-button switch latches a bathroom exhaust fan (or other load) on or off. Push the switch and T2, a BS170 NFET, is latched on and the fan turns on; push it again and T2 ...

Figure 1 Circuit converts momentary action push switch into latching power switch.. To understand how the circuit operates, assume that the DC power supply, +V S, has just been applied, capacitor C1 ...