circuit to convert 30 mv to 5 v.

Discussion in 'The Projects Forum' started by Sankalpsood, Jan 29, 2016.

  1. Sankalpsood

    Thread Starter New Member

    Jan 19, 2016
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    people, i am trying to use thermo-electric cooler/generator to run a 5 volt dc motor. my problem is that the output of the TEG is as low as 30mv to 50mv. I know that an op amp can be used for the purpose but i need to confirm the ic number and the circuit please. I need to convert 30mv to 5 volt.
    please tell me a circuit to complete this process. Or any other feasible method to do this.
     
  2. Papabravo

    Expert

    Feb 24, 2006
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    What you want to do is physically impossible. An opamp by itself will not produce the power required to run a motor. The power to run the motor has to come from an external power supply.
     
  3. Sankalpsood

    Thread Starter New Member

    Jan 19, 2016
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    thermoelectric fans have already been made. they are too using something or the other to do this function.
     
  4. Bordodynov

    Active Member

    May 20, 2015
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  5. Papabravo

    Expert

    Feb 24, 2006
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    The problem is that you are assuming you know how to do it. Tell me how much power you think you can extract from a 30mV signal. A couple of microwatts -- maybe. Not enough to run a fan.
     
  6. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    Could you show a link to one you have precisely in mind?
     
  7. Evanguy

    Member

    Dec 21, 2014
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    Last edited: Jan 29, 2016
  8. JWHassler

    Member

    Sep 25, 2013
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    You might need to series a few of those to get enough voltage to run a boost-converter.
    And maybe parallel a few to get enough power at the boosted voltage.
    How much power does your motor require? That's your starting point .
     
  9. Papabravo

    Expert

    Feb 24, 2006
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    A boost converter will always have less power out than power in. Sometimes by a fairly wide margin. SMPS design is not for the faint of heart, and it is easy to make mistakes with smokey consequences.
     
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