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Subject: Re: Any good uses for old microwave over parts?
References: <firstname.lastname@example.org> <email@example.com> <3DD09F67.C2A8FC0F@managesoft.com>
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Date: Sun, 17 Nov 2002 17:38:12 -0500
NNTP-Posting-Date: Sun, 17 Nov 2002 17:38:15 EST
Organization: Bell Sympatico
There is another possible use for the microwave power supply.
Build an electrostatic air cleaner.
If you survive to use it.
They run at about 12,000 volts DC .
What is the voltage from the m/w p.s ?
Is it DC ?
On Tue, 12 Nov 2002 17:27:51 +1100, Clifford Heath
>"N. Thornton" wrote:
>> I keep wondering if a single TF would be enough to make a really small
>> spot welder... How would one do that?
>I have a small commercially made spot welder designed for use by
>orthodontists to tack-weld stainless steel wires and brackets. It
>uses a hefty relay to discharge a largish fast-discharge electrolytic
>cap through a transformer which has a secondary akin to copper water
>pipe :-). There's a small variac to vary the charge voltage on the cap.
>Nice device - a foot pedal yanks the pincer-like electrodes down until
>a microswitch built into the pincer mechanism detects sufficient force,
>when it fires the relay. So you have both hands free to position the
>work, and the welder doesn't fire until the parts are clamped hard
>enough. I don't know if a MOT could be pressed into service as the
>pulse transformer, but I suspect it could - perhaps the primary would
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