HOW TO – Make an Op-Amp hot tub temperature controller

Technology
HOW TO – Make an Op-Amp hot tub temperature controller

Pcb-1Jake writes “When the temperature controller on my $50 garage-sale hot tub failed I balked at springing for another electro-mechanical thermostat so I built this one using junk box parts with the help of that classic: The Engineer’s Mini Notebook – Op-Amp Projects from Radio Shack.” Link.

6 thoughts on “HOW TO – Make an Op-Amp hot tub temperature controller

  1. eschamp says:

    Do you think this will work with a water bed (desired temp around 90 degrees F)? How close does it hold the temperature?

  2. vonSlatt says:

    It holds the temp to one degree or better, the thermometer in the tub just doesn’t move. I’m sure it would work with a waterbed.

  3. vonSlatt says:

    It holds the temp to one degree or better, the thermometer in the tub just doesn’t move. I’m sure it would work with a waterbed.

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