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From: Spehro Pefhany
Subject: Re: Phase Sequence Indicator Circuit?
X-Newsreader: Forte Agent 1.92/32.572
Date: Mon, 23 Dec 2002 15:01:33 GMT
NNTP-Posting-Date: Mon, 23 Dec 2002 10:01:33 EST
On Mon, 23 Dec 2002 00:15:49 GMT, the renowned James Meyer
> I would get a small three-phase motor. Surplus for cheap and with a
>gearbox if I could. Then I'd put a disk on the shaft and paint it with some
>stripes of black and white. Wire the motor to the converter's output and place
>it somewhere so that you could see the disk.
I've seen this used in commercial units.
> If that's too simple, then I'm sure someone could write a program for a
>PIC chip to do the job.
Or use a few 4000 series CMOS chips to do it. Brownout and missing/bad
phase detection are other possible features which could justify a
Don't forget that the standard direction of the phases is reversed in
Australia (something to do with the Coriolis force, I'm sure).
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