Inside a slightly bizarre car to “mains” adaptor.
I’m not sure what to make of this. It’s technically intriguing but I’m struggling to work out its purpose other than possibly being for running older plug-in power supplies for …
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Tag: mains
Cheap eBay mains voltage tester. (10 to 380V)
When I was an apprentice my first set of “test lamps” was a very basic Steinel tester with two LEDs that simply indicated the presence of voltage at a reasonable …
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A look inside some mains voltage LED tape.
There seems to be a lot of this flat wall-power LED tape available on eBay. so I bought some recent stuff to take a closer look at, including the internal …
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Simple Chinese mains LED flashing light string.
This is one of the simpler mains voltage LED lighting strings sold by many Chinese sellers on eBay. It does away with the traditional multi-channel flashing controller and instead uses …
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Using LEDs as mains indicator lights on 120V and 230V (live demos)
Modern LEDs are bright enough at low current to use as directly mains powered indicators with minimal circuitry. The slight downside is that with a simple resistor circuit the vast …
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Inside a cheap eBay mains voltage cup warmer.
On the basis that a mains / wall-power cup heater is bound to have a bit more oomph than a USB one, I decided to order one to check it …
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