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Peltier Element- Schematic Help H-bridge

Discussion in 'General Electronics Discussion' started by dani111, Aug 28, 2019.

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  1. dani111


    Aug 28, 2019
    I need help to anyone who can help me [​IMG]

    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.

    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.


    Thank you! :D
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011


    May 20, 2017
    Why not simply use a relay wired to perform the crossover function. Much less complicated.
    Harald Kapp likes this.
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