Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Well ok then.  Good to see someone making use of them.

The local scrappers have discovered microwaves have big chunk of copper in them, so they’re getting rarer here.

As for safety, if you power up a microwave and stick your hand in it you deserve what you get for being stupid.  Unpowered you need to watch out for the capacitor, if should be discharged by the bleed capacitor, but maybe not.  And the magnetron may have beryllium in the ceramic which will make your testicles fall off or something if you eat too much of it.  Also try not to drop the transformer on your foot, they’re really heavy.

As mentioned you cut off the secondary and put a few turns of the thickest wire you can find to get a low voltage high current power supply – a spot welder.  Google ‘MOT welder” for heaps of into.  MOT = microwave oven transformer.

Oh yeah, there is also a fan in them if you feel like chiselling off all of the gunk coating it.  And really old ones have a really fine wire mesh on the door, might be useful for something.

Tony

A current project in my local radio club. Converting it from a power regulator to a voltage regulator and then using it to power a linear amplifier, built around an eastern bloc ceramic triode. All the safety caveats expressed by others apply equally here.

Bill

What are you doing with the inverter?

 

Tony

 

If it happens to be a Panasonic inverter microwave oven, grab it with glee and store it away for a future project..... If we lived closer, I would take it off your hands.

On 14/02/2016 4:03 PM, Stefan Trethan stefan_trethan@... [Homebrew_PCBs] wrote:

Don't you think all this talk about freecycle or dropping her off at

the side of the road is a bit premature? I'm sure there is _something_

she can do in the shop, where you can keep an eye on her, even if you

can't trust her alone in the kitchen any more. ;-)

Joking aside, I'm looking for another microwave oven transformer to

make a spot welder. The thing is I seem to fix them all up so I never

get the transformer.

I don't think it is terribly useful as a microwave, in the shop.

Yes there is the occassional heating requirement but typically I don't

dare to use a microwave because I don't know how these odd materials

will behave. If you did the same thing regularly you could experiment.

I think you can even make small metal castings with a microwave oven.

ST

On Sat, Feb 13, 2016 at 8:44 PM, Corey Minion csminion@...

[Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:

I was trying to

think of workshop uses, and honestly I can think of none.

Whadaya think - Uses?

Thanks

Corey

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Posted by: Stefan Trethan <stefan_trethan@...>

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