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From: "Tom Shaw"
References: <6rEU9.4854$xE1.699863@stones> <3E247AF7.8EB4F560@rica.net>
Subject: Re: Motor control - using voltage ranges
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Date: Mon, 13 Jan 2003 21:39:33 -0000
NNTP-Posting-Date: Mon, 13 Jan 2003 21:39:11 GMT
Organization: Customer of PlusNet
Yes thats about it...
Ill explain more to clarify.
I have two reference voltages, and an actual reading voltage.
The circuit is for a temperature controlled heater/fan system. The
temperature goes up and down, and I need to be able to set the level at
which the exaust fan would begin to turn, and also the level that the fan
should be at full power, the speed of the fan increasing proportionally.
My problem is getting the two reference levels to compare against the actual
"John Popelish" wrote in message
> Tom Shaw wrote:
> > Im trying to develop a small circuit that will enable me to control the
> > output of a motor.
> > I want to be able to define at what voltage the motor will start to
> > and what voltage the motor will be at maximum power.
> > eg
> > using a lo = 3v and hi = 5v, if I supply a 4v input it will supply the
> > with 6v (or 50% of the available voltage)
> > Any help on this would be greatly appreciated.
> Are you saying that you have a control signal that swings from 3 to 5
> volts, and this is supposed to change the motor voltage
> proportionately from some unspecified minimum voltage (that is
> approximately the threshold of motion for the motor) to about 12 volts
> (the supply voltage)?
> John Popelish
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