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    Peltier Element- Schematic Help H-bridge

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    Duet Hardware and wiring
    peltier h-bridge schematic electronic help
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    • Dani111undefined
      Dani111
      last edited by

      Hello,
      I need help to anyone who can help me 🙂

      A peltier can be reversed. So If I supply + to RED and - to BLACK
      it works as expected. But if I reverse the polarity, ( - to RED, + to BLACK), it will also reverse the cold and hot side.
      (To prevent the other side getting too hot, I have a heatsink on it with a fan blowing cool air over it.)
      I want to connect and control the element using MSP430 as launchpad(power supply: 3.3v) I use TEC-40-33-127.

      0_1566976311799_peltier.PNG

      I need to think about how to connect and control the 4 switches (4x IRF1405) to power the peltier in both ways, how to use the H-Bridge in both polarities.
      I need your help because I don't know how to make the circuit schematic I don't know what values to choose from resistors,
      capacitors and what kind of diodes to use, how to to maintain the current so as to the whole circuit should work .
      I attached below an exemple without H-bridge and I want something similar as in the schematic but for my element and with H-bridge.
      0_1566976594814_schematic1.png
      Thank you! 😄

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      • dc42undefined
        dc42 administrators
        last edited by

        If it were me then I would look for a full bridge mosfet driver chip, to drive four N-channel mosfets.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • A Former User?
          A Former User
          last edited by

          Wouldn't it be easier to just use a motor driver (module) which is essentially an h-bridge? Saves you the trouble of dealing with components.

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