Simple Adjustable Threshold Temperature Alarm Circuit Diagram

Simple Adjustable Threshold Temperature Alarm Circuit Diagram. This is a simple temperature alarm circuit diagram, when Rl increases as temp decreases, the output of IC1 goes positive, turning on Ql. Ql conducts and causes Q2 to conduct, turning on the audible alarm. The threshold is set with potentiometer R2. 

Adjustable Threshold Temperature Alarm Circuit Diagram


Simple Adjustable Threshold Temperature Alarm Circuit Diagram

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