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Over-Voltage Monitors

 

Last Updated: June 02, 2021 01:44 PM

Circuits Designed by Dave Johnson, P.E. :
MICRO POWER OVER-TEMPERATURE ALARM
The circuit is powered for years by a single 3 volt lithium battery. It sounds an alarm when the temperature exceeds a certain point. With some minor changes the circuit could also be configured for an under temperature (freeze) alarm. The circuit uses a cheap but accurate thermistor as the temperature sensor.

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Over-Voltage Monitors


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