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Heavy Lift Electromagnet from Microwave Oven Transformers | Lrd12 Overload Relay

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The thing about the picture that worries me is the receptacles seem to be mounted below 18 inches from the floor. That is a BIG NO-NO. IF there are any gasoline cans in the garage for an old lawn-mower, etc then he has just created an explosion hazard.

When I was a kid I built a Tesla coil using a 12kV neon sign transformer which my mom got for me (this was the 1960s, before Americans turned into wimps). At some point I had the transformer sitting on my workbench and plugged in, with nothing connected to the output. The corona discharge made a hissing sound, but I had music on and couldn’t hear it. Perhaps eight inches away was my table radio, which had a metal chassis. I reached between the two to get something, and my arm shortened the air path enough for an arc to form. I had a couple of nifty burn marks (entry and exit) for a few weeks.

Typically, drivers are rated to handle surges in the range of 1 to 4 kV. The varistor, ranging from 7 to 14 mm in diameter, is usually located downstream of the fuse on the ac mains. However, to provide higher-level surge immunity for lighting installed outdoors in exposed surge environments, outdoor-lighting OEMs may want to add surge-protection devices (SPDs) on the ac input lines of their luminaires ahead of the LED driver.

But despite them being ‘commercial’, they’re still pretty hideous bits of cheap Chinese kit that I wouldn’t trust as far as I could throw them.

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The time-multiplexed full-color RGB pixel technology generally worked well to deliver very high resolution with no gaps at all between the pixels. The only place I was aware of the EVF pixels were in diagonal strokes of letters on the various VF info readouts, or on the electronic level display, when the indicator lines were tilted. I never saw pixel jaggies when looking at the subjects I was shooting, even in the case of sharp high-contrast edges.

He did specifically mount/build that setup around the possibility of failure. He talks about it in the first few minutes of the video. Kinda a hyped up headline.

A word of advice: if your idea of working safely on mains-powered stuff hinges on an RCD protecting you it might be a better idea to put down your tools and back away, slowly…

I heard from an instructor that some guys from the national power company use full PPE when switching on/off old main fuses in domestic installations (230V, 15 to maybe 60A). These things are fully plastic and can be operated by everyone, so no PPE needed, but it seems like they explode sometimes – maybe because of the dust you mentionned.

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There are notable advances in interior quality and function, most significantly with the dash getting a complete overhaul that includes better materials, layout and an eight-inch screen operated by buttons and touch as standard. It’s both smart and reasonably intuitive, albeit slightly short of some of the slickness of VW’s various systems. As is common in the class, Toyota has expertly put the best materials where you are most likely to see and touch them, with hard, basic plastics mostly hidden in corners of the car.

The rest of the circuit would be built on the backside, with judicious use of surface mount electronics rated for miltemp operation (to 125C). Standard connectors from Samtec or Molex can handle the current drive easily, with no problems from the heat. Add an acrylic conformal coat on the backside, or perhaps potting the electronics, and you can make the entire module one single brick module.

But Mike I would gladly clean under your stove for around 3kW of free power… Ahh ok so his parent’s don’t have a 220/240 outlet, makes much more sense now. In that case its a purpose driven hack, elegant in its simplicity.

I know a lot of people that have never heard about “makers” but I wouldn’t trust them near any mains wiring – like my own dad who has wired a circuit breaker between live and neutral. Only the ensuing BANG and my mom’s swearing and yelling from the now dark kitchen have disabused him of the idea that that is how it should be done.


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