LED has become more and more popular for use as light indicator because of its low cost and long life. Unfortunately the LED works only at low voltages and even then you need to use a resistor in ...

Craving this simplicity, [Tom] invented the Cheap Universal LED Driver, or CULD, to do the job instead. The CULD is designed as a simple LED indicator that will light up anywhere from 5V to 50V.

Learn how to make a powerful 220V LED light and connect it with a 3V setup. This easy guide will walk you through the process of creating bright and efficient lighting at home.