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Freezer thermostat circuit
 
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Freezer thermostat circuit


Robin2
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© © Original submitter. This image may not be reproduced without permission
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NBLeopard

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It's an op-amp..set up as differential mode.. connected to switch on a light...an LED...when temperature falls below that set by the 'pot'...designated VR.

Do I get a prize...?

Unlikey to be that accurate though...as temperature of external components would also affect the point at which it operates.

You can't really beat the old fashioned thermostat with a bimetal switch.

 

Bob

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It's an op-amp..set up as differential mode.. connected to switch on a light...an LED...when temperature falls below that set by the 'pot'...designated VR.

Do I get a prize...?

Unlikey to be that accurate though...as temperature of external components would also affect the point at which it operates.

You can't really beat the old fashioned thermostat with a bimetal switch.

 

Bob

 

Very interesting, no prize though!

Link to comment

It's an op-amp..set up as differential mode.. connected to switch on a light...an LED...when temperature falls below that set by the 'pot'...designated VR.

Do I get a prize...?

Unlikey to be that accurate though...as temperature of external components would also affect the point at which it operates.

You can't really beat the old fashioned thermostat with a bimetal switch.

 

Bob

 

Very interesting, no prize though!

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