Designing a cheap circuit that uses rectified mains to power LEDs and a CPU fan
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Dr. Slack
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Sat Sept 20 2014, 05:52AM
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Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
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tarakan2 wrote ...
Now I am curious about "unsolicited capacitor ballast circuits" because I feel a need for such circuits in other places. I will keep a secret.
Yes, the problem was the fact that it was unisolated was unsolicited, so that when my niave user (a neighbour reading humanities) took it into the bathroom with him, I was lucky he only got a tingle rather than a lethal belt off what he rightly took to be safe to touch. It was a power supply for his portable radio, and I was dead chuffed to cram a bridge, a few capacitors and a zener into a PP3 battery case. If you ever do use that sort of circuit, make sure your supply lead is polarised for live/neutral, and make sure the equipment is grounded.
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