This thermostat will allow you to set two different temperatures.
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Thermostat With Hysteresis - Photograph

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This is a photograph of the Cmos based Thermostat With Adjustable Hysteresis. The circuit allows you to choose the size of the gap - between the temperature at which the relay energizes - and the temperature at which it de-energizes.


A Photo Of Ron J's Cmos 4001 
Based Thermostat With Hysteresis


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