piclist 2002\09\18\051116a >
Thread: simple temp switch
www.piclist.com/techref/index.htm?key=simple+temp+switch
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face BY : Roman Black email (remove spam text)



Alan B. Pearce wrote:
>
> >I'm looking for a simple, non powered temp sensor that when it reaches a
> >certain temp, it closes a relay.
>
> Go looking for a bimetal thermostat of the kind used in home heating. This
> will come with a roughly calibrated temperature scale as well.


There are a number of manufacturers now producing
nice thermo-mechanical switches in the "transistor"
TO220 package. These are available in decent current
sizes and N/O and N/C contact types, and you may not
even need the relay. :o)
-Roman

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