Temperature Alarm

[Fedorenko]

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.

 

[flyingember]

wouldn't it just be cheaper to buy one?

http://www.pcpowercooling.com

$10

 

[notasparagus]

But you can't beat the feeling of knowing you did it yourself

 

[flyingember]

But you can't beat the feeling of knowing you did it yourself

wouldn't you also know it actually works by buying one?

 

[notasparagus]

wouldn't you also know it actually works by buying one?

Well, its not like you can't test it.

 

[armatage]

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.

 

[Fedorenko]

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