A thermistor and preset pot lets you set the temperature at which the relay will energize.
COMMENTS Homer SUGGESTIONS

Temperature Switch No.2 - Photograph

MORE CMOS PROJECTS

Thermostat No.2
Schematic
The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International


When The Temperature Falls - The Relay Energizes

This is a photograph of Thermistor Controlled Relay No.2. The variable resistor lets you set the temperature level below which the relay will energize. A second version of this circuit - Thermistor Controlled Relay No.1 - will energize the relay when the temperature rises above the preset level.


A Photo Of Ron J's 
Temperature Controlled 
Relay Circuit No.2


Click here if you're new to constructing stripboard projects.

Thermostat No.2
Schematic
The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International
Free Web Hosting