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  • I've just modified this Microwave Oven Transformer

  • into a dangerous little device. 800 amps of

  • electrical current is about to be really bad news for

  • anything made of metal.

  • Today I'm in the mood to melt some metal. This

  • Microwave Oven Transformer used to be a dangerously

  • high-voltage device, but I modified it so the

  • voltage is extremely low, and it's the amps now

  • that are insanely high. High enough that when the

  • electrodes touch this screw, it melts into a little

  • ball of steel. This time I've hooked it up to a

  • machine screw for melting, and when it heats up it

  • changes color and the outer layer bursts into

  • flames. If I hold the electrodes in constant

  • contact, you can see molten metal flowing down the

  • screw, and within seconds it's completely gone. I

  • just love the way these light up and flash,

  • throwing off sparks as they melt. This bolt is

  • longer so it's taking more time to melt. You can

  • see an array of color changes as the metal heats up

  • to the point where it begins to glow a burning

  • bright orange. Back on my workbench, you can see

  • the input voltage to the primary coil is about 120

  • volts AC, which is typical mains power in my area.

  • And with this modified secondary, you can see I've

  • stepped the potential down to only 3 volts. The

  • voltage is so low that I can actually touch the

  • live wires with bare hands, and not feel anything.

  • Even though the power being generated is enough to

  • completely incinerate this wood screw on contact.

  • This much power has the potential to kill you, so

  • don't ever try this yourself. Now here's a 5/16"

  • bolt I'm trying to melt, and it's building up so

  • much heat that my 4 gauge electrode wires are

  • smoking. As it's cooling, I'll try a little

  • amateur blacksmithing while I have the chance,

  • because this got so hot, I just melted my melter.

  • 4 gauge wires just aren't enough to handle the

  • extreme current pumping through these wires.

  • That's ok though because the primary coil is still

  • good, so I'll just rip off the secondary so I can

  • use the rest of this in another project, like

  • making a makeshift stick welder. Look for that in

  • a future video. In the meantime, I still have this

  • other MOT that was salvaged from a microwave in a

  • previous project, and after making the proper

  • modifications, I've got a new metal melter sporting

  • this thicker 2 gauge wire. To fire it up, I'll

  • attach input wires to the primary coil, plug those

  • into a power bar, and flip on the switch. You can

  • see the low voltage sparks off the terminals, and

  • I'm measuring their potential at just over 2 volts.

  • Once again, for your entertainment, I'm holding the

  • leads bare handed, and you can clearly see there's

  • power to the system because of the electrical

  • arcing. There's also a visible amount of current

  • pumping through this screw. The thicker wire

  • should be able to handle higher temperatures than

  • the first, so I'm going to experiment on various

  • items around the house, like this iron nail. And a

  • drywall screw. How about some lead solder. Or a

  • zinc washer. And various other objects made of

  • metal. One friend suggested I try melting a

  • padlock and that seemed like a fun idea. It's at

  • full power and the steel retaining clip is getting

  • extremely hot, but the metal isn't melting.

  • Something inside the casing just caught fire

  • though, and although the retaining clip isn't

  • melting, the lock is so hot that the clip just fell

  • open. Along with the rest of it. I'll try a

  • couple of amateur spot welds on some stainless

  • steel, and i'm impressed at how much effort it

  • takes to get them to break. When experimenting

  • with an aluminum can, the electrodes cut through

  • the metal like butter, but this thicker aluminum

  • disc won't glow at all. I'm not sure how hot it is

  • but when I drip water on it, the water is instantly

  • boiled and vaporized. I did get this steel coin

  • pretty hot, and if it'll do that, i'm wondering

  • what it will do to steel wool. Amazingly, nothing

  • happens unless the electrodes are so close they're

  • almost touching. Aluminum foil isn't very exciting

  • either, but I've managed to reduce this sheet down

  • to a little blob of metal. I've got some Neodymium

  • magnets ready, but the voltage is too low to get

  • through all eight. However, if tap onto two, it

  • seems to be working really well. They're getting

  • so hot they've gone totally incandescent, and

  • apparently have just been liquified. These are

  • among the worlds strongest magnets, but after

  • exposure to temperatures over 300ºC, they lose most

  • of their magnetic properties. Here's a large steel

  • nut that's harder to heat, but in the end it glows

  • very nicely as well. This one's just got so hot

  • that it's exploding liquid metal. As expected, I

  • got no visible reactions from a 250 volt lightbulb,

  • or this audio transformer. But I did have a lot of

  • fun melting down the tines on this fork. This

  • brings back memories of curling plastic forks over

  • the fire as a kid. It's not very useful anymore,

  • but it looks pretty neat. I'm applying a current

  • to the underside of this knife and can visibly see

  • the point of contact. The whole blade is glowing

  • and this is looking really cool. At this point,

  • the blade is really easy to bend. For my last

  • trick, I got a circuit board with some high

  • temperature solder that my desoldering iron

  • wouldn't melt. But hooking a couple of nails to

  • the electrodes gives me the ability to instantly

  • liquify the solder on these contact points. Well

  • we cheated death again and destroyed a lot of metal

  • doing it. If you like these videos, you can

  • support me by becoming a subscriber and sharing

  • with your friends. I appreciate your support.

  • Thanks for watching.

I've just modified this Microwave Oven Transformer

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B1 中級

金屬熔化器 (The Metal Melter)

  • 59 5
    VoiceTube 發佈於 2021 年 01 月 14 日
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