Intro When using my new Energizer pivot torch i noticed that it dims itself slowly over 15 minutes from the start, reaching 1/10 of the maximum intensity. The torch does this on purpose and can be reset by turning it off and on again. The HD vision headlamp This lamp is probably my most used torch in my life. Even though I got it about 8 years ago for caving, it saw most action as… Continue reading
Intro Ahhhh LEDs….don’t we love them? Today there is a huge variety of them. But there is one type I particularly like. These 5 mm RGB diffused LEDs, easily available from various sources and quite cheap (amazon.de, aliexpress, ebay etc). Here’s why I like them They are super bright. According to some datasheet which may or may not be what you are buying from less reputable sources, the green LED peaks at 5000 mcd at… Continue reading
How do you test a power supply? With an Analog Discovery controllable electronic load, of course! Continue reading
Simple hack to dim the light down and extend battery life, makes a good night light! Continue reading
A simple way to measure low and high current at the same time with small burden voltage without using expensive hardware. Continue reading
Do LEDs really last as much as they say? I’m building a tester to find out. Continue reading
How to drive LEDs? WIth constant current supplies, of course. Continue reading