How to make a temperature controlled switch for 220v ac fan.?

Discussion in 'The Projects Forum' started by iq., Dec 24, 2014.

  1. iq.

    Thread Starter New Member

    Dec 24, 2014
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    Hey! I need to make a 220volts ac temperature controlled fan from 220v ac supply and i am just a beginner! Can anyone please suggest me how to use a 220v relay in it?
     
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    Something like this:
    1. LM35
    2. Op Amp amplify circuit.
    3. AC220V to 5Vdc adaptor.
    4. AC220V SSR or Relay or Photocouple and TRIAC.
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,420
    3,355
    Just go out and buy a manual baseboard heater thermostat:

    [​IMG]

    Edit: oops. This might be operating the opposite of what you want. But I have something similar in my greenhouse. The fan comes on when the temperature rises above a set temperature.
     
    Last edited: Dec 24, 2014
    iq. likes this.
  4. MrChips

    Moderator

    Oct 2, 2009
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  5. iq.

    Thread Starter New Member

    Dec 24, 2014
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    Thanks for your help!
     
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