More than one-fifth of US electricity is used to power artificial lighting. Light-emitting diodes based on group III/nitride semiconductors are bringing about a revolution in energy-efficient lighting ...

Many people believe that the LED was discovered by US researchers working in the 1960s. In fact, Henry Round at Marconi Labs noted the emission of light from a semiconductor diode 100 years ago and, ...

There are lots of different ways to build a clock. [Sciter_] came into the possession of some old calculator parts, and ...

With the PCB fabrication services available to the modern hobbyist, it’s become increasingly common to see replacement boards ...