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Temperature Alarm

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Fedorenko

Member
Joined
Aug 6, 2002
Location
Brisbane, Australia
Can anyone point me into the dircection of a kit or diagram on how to build a simple PCB board temperature mointor that sound a piezzio buzzer when it exceeds a certian amount.
 

armatage

Member
Joined
Aug 9, 2001
Location
The Motherland
All you need is thermocouple fed into a pre-amp and then a comparator who o/p if fed into the base of a transistor which drives the piezzio buzzer. The temperature can be set by varying the reference voltage fed into the comparaitor.
 
OP
F

Fedorenko

Member
Joined
Aug 6, 2002
Location
Brisbane, Australia
armatage said:
All you need is thermocouple fed into a pre-amp and then a comparator who o/p if fed into the base of a transistor which drives the piezzio buzzer. The temperature can be set by varying the reference voltage fed into the comparaitor.

Thanks. Well, umm, err.... I think I will get the 110 Alert :D