The circuit is too simple so that it can be enclosed in a small box. A 12 volt miniature battery is used to power the circuit. Two transistors T1 and T2 are used as electronic switches to turn on / ...

The switch is a semiconductor relay S202DS2 and the oscillator is 4060. Sensor Light Switch Schematic. From the moment that T4 and T5 are opened, relay’s LED start to light and powers the lamp. As ...

The advent of battery powered LED fixtures has made the need for wiring a light in the closet or over a bookcase a thing of the past. Putting a bright light almost anywhere has never been easier.

Skip the tangled strings of holiday lights this year and go wireless using a few copper-coated cents. U.S. pennies minted since 1982 conceal a zinc core. If exposed to […] ...