--- In Joel Winarske <> wrote:
>
>
> > I'm kicking around the idea of controlling an ordinary 120 VAC
> > incandescent light (actually a 150W heater).
> >
> > I'd like to control the heater based on the temperature of the surface
> > beneath it. I need to control it to approximately 105 deg F (more or
> > less; great accuracy is not needed here.)
> >
> > I've found some basic PIC circuits on the web but I wonder if anyone
> > here has any suggestions, both for the temp probe and for the heater
> > control.
> >
> > As this will most likely be a one-off, an inexpensive commercial
> > solution would be fine.
> >
>
>
> You would need:
> 1. Zero Crossing input
> 2. DC Power circuit
> 3. PWM / Triac Control
> 4. Load current protect circuit
> 5. temp measurement - A/D
> 6. Control interface - RS485/CAN/RS232
>
> The NXP LPC2xxx is a good fit for this.
>
> How many channels do you need?
> How far from the controlling device do dimmer channels need to be
located?
>
Sorry, I should have been more detailed....
I want to run the temp probe into the A/D inputs on a TS7xxx board,
and then have the board control the heater.
The reason for this is that I also want the ability to set up a webcam
and multiple control channels, and I want web-based programmability.
So I'm really looking for a 120VAC dimmer that can be run by a TS7200.
All I've been able to find are PIC based designs, which I could
probably adapt, but I am not a hardware person...
--Yan
------------------------ Yahoo! Groups Sponsor --------------------~-->
Check out the new improvements in Yahoo! Groups email.
http://us.click.yahoo.com/4It09A/fOaOAA/yQLSAA/CFFolB/TM
--------------------------------------------------------------------~->
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|