Re: [ATM] Making glass blanks.

["Geoff Nelson" <gjnelson@absamail.co.za>]

> A fully self contained circuit would be great, but circuit that can
> read the temperature and give it to the computer, and another circuit
> that would be able to lower the voltage to whatever voltage the
> computer tells it to would work just as good.  I have no problem
> writing software.  I already have a temperature sensing circuit, but
> the circuit to control voltage eludes me. This is probably very simple
> for someone, and hopefully that someone subscribes to this list. <g>

How about PWM circuitry. I am not an electronics expert but have 
thought about this kind of thing. Current control is often done by 
PWM which means your net power will be controlled if your voltage 
remains constant. 

It may be possible by using a number of light dimmer circuits in 
parallel with the same input signal. 

Your temperature sensing circuit will give you feedback control so 
you should be able to compensate for any differences. 

The control of the system could be done using a similar concept to 
Mel Bartel's system for computer control of a telescope.

All these are opinions that may be based on sound principles of which 
I am unaware. If they are actually usable it is coincidental.

Geoff
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