| Here comes a dazzling DYI project allowing you to touch an electric arc (30 kV hey presto) with your bare fingers. No harm from that. Though...
All items tagged with Energy and light (9)
| Supposing you’d want to bring some light into a boat or campervan during the evening you could connect a couple of 12-V incandescent lamps t...
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| Before electric lighting became common in the early 20th century, candles and oil lamps were commonly used for illumination. Even a modern c...
| If the Stairway to Heaven was fitted with lights I guess they would look something like this… Each step is softly illuminated in sequence by...
| Even the best silicon panels collect only about 20% of available solar radiation and they require additional devices to convert the energy t...
| High brightness LEDs and special optics allow street lamps to be spaced up to 50 meters apart -- much wider than is possible with other solu...
| The backlights used in some LCD panels are not exactly economical: typical current draws of 20 mA to 100 mA are common. Normally the current...
| As opposed to the good old light bulb, a CFL needs an amount of electronics to start and light properly. Here we show a suitable circuit. Th...
| The popularity of halogen light is still increasing, and rightly so because of some distinct advantages: the colour temperature is agreeab...