Also, if you leave your oscilloscope floating at mains voltage with an isolation transformer puts you in danger as all earthed parts of the oscilloscope will be floating at that voltage. Again: when things are floating, it is ok to have 1 fault.. but the second fault will definitely kill you or break something as no RCD will protect you.
That depends on the country. I live in Europe, and people here are allowed to do basic repairs and modification with mains voltage, like adding extra outlets. All the materials such as PVC conduits, wires, outlets, lights, switches and dimmers are readily available in the hardware store. It is however not allowed to mess with anything before the meter or fuses. Some equipment like electric stoves don’t come with power cords. Instead, you open up some compartment, and attach the wires on some screw terminals.
But 110/120v A/C? that stuff is baby-play, as long as you realize that you shouldn’t use both hands, or use grounding straps, it just kinda buzzes, I’ve played around with TENS devices that had more (felt) kick than it…
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They make silicone pad heaters for automotive stuff like someone else mentioned, that would probably work too.
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I like these more and more. Good size for my needs, and handsome styling. Standard hybrid probably makes more sense for me, but I’d have to give it a look.
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It’s still dangerous though. Cost of a 12V power supply vs a small chance of killing myself, I’d spend the money. 3D printers aren’t cheap anyway, why economise on safety?
I’ve done enough research about power capacitors and mains voltage that after I unplug anything, including all the TV’s that I work on, to repeatedly press and/or hold the power button until I’m satisfied that it’s discharged before cracking it open.
No, he is using a MC3041 to drive a BT137 which can handle 8 amps continuously (if properly heatsinked).
Europe is a real patchwork of degrees of sketchy. German wiring standards are very high indeed, at least in the semi-industrial places (laboratories, hospitals) I worked. The real Schuko plug/socket design is quite nice and safe, and hard to find *not* implemented correctly in Germany. Other countries, not so much. And don’t get me started on English and South African wiring and plugs.
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