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Subject: Re: Determining a circuit's control parameter?
Date: Thu, 28 Nov 2002 19:40:09 -0000
NNTP-Posting-Date: 28 Nov 2002 19:40:11 GMT
X-Newsreader: Microsoft Outlook Express 5.50.4920.2300
20k pot in series with a fan will be on/off :)
without some sort of pass transistor this isnt going to work.
"The little lost angel" wrote in
> I have a fan that's controlled by a potentiometer which I would to
> make automatic depending on a control voltage.
> The pot turns up to 20KOhms and I measured a max of 4V across it at
> lowest (6 Ohms) position. If the pot is disconnected totally, the fan
> still spins at the lowest speed. Highest speed is achieved with lowest
> Is possible to figure out whether the speed of the fan is controlled
> by a voltage divider with the pot as one of the resistor pair, or by
> the measured voltage drop across the pot, or by the current flowing
> through the pot or some other mechanism?
> L.Angel: I'm looking for web design work.
> If you need basic to med complexity webpages at affordable rates, email me
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