Small Mosfet transistor to high power Mosfet driver


  • Hardware Contributor

    This is quick tip on how to drive a power mosfet transistor with a small one. Let's say that we would like to drive a pump with a wireless signal and that we have one of those boards with a N channel mosfets on:
    DSC_0382_00.jpg
    We need to make a few modifications:
    Izsek.png
    Connect D3 and D4 with a bridge, change a D1 diode with a 1k resistor and connect:
    DSC_0380.jpg
    Those changes make up to this schematics:
    schematics_00.png
    And here are the signals:
    DSC_0386_01.jpg
    The blue signal is the output from the digital pin D3( PWM ), and the yellow signal is the signal on the gate of the power mosfet, which is a P channel mosfet.


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