Switching ac power on and off has been a challenge since Edison and others started switching power more than 125 years ago. Now, a solid-state relay (SSR) uses a patented zero-voltage crossing ...

Machinists have a lot of neat shop tricks, but one especially interesting one is shrink-fitting tools. Shrink-fitting achieves an interference fit between tool and holder by creating a temperature ...

As analog engineers, it’s tempting to fantasize about one day coming close to designing the ideal operational amplifier we encountered in college: infinite bandwidth, zero output resistance, and so on ...

This lamp life extender project is intended to create an appliance to enhance the existence of luminescent lanterns or lamps. Luminescent lanterns or lamps show signs of very small resistance in ...

For over a decade, thousands of users have deployed permanent electrical safety devices (PESDs) to reduce the risks in isolating electrical energy. This elegantly simple innovation increases the ...

The project is designed to develop a device to increase the life of incandescent lamps. This project is designed to develop a device to increase the life of incandescent lamps. Incandescent lamps ...