Stop walking across a dark room to turn on the light. Install a 3-way switch and control lights from two locations.

Using a Transfer Switch A transfer switch allows you to switch between utility power and power from a generator on dedicated circuits, preventing any backfeeding.

Both use electricity and both give off light, but that's where the similarity ends. The solution is to buy a dimmer switch rated for both CFL and LED bulbs.

A useful circuit to have in designer’s toolbox is the “high side switch”. Like it sounds, this is a circuit that switches the “high side” or positive voltage to a load.

Switch-debounce circuits have been around for a long time, but I'm revisiting them because the art of designing them has skipped a generation of engineers. One example of a switch-debounce circuit ...

Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to ...