| Even the best silicon panels collect only about 20% of available solar radiation and they require additional devices to convert the energy t...
| Even the best silicon panels collect only about 20% of available solar radiation and they require additional devices to convert the energy t...
| Elektor in 1984 saw a niche for a disco lights controller that was unusual and novel in not being limited to dull, fixed light patterns. In...
| A handful of high-intensity LEDs is sure to provide new accents in room lighting. In traffic lights and other signalling equipment, they sav...
| This article describes a low-cost alternative to the normaily pretty expensive lamp used to light the photographie darkroom. It consists of...