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Small Mosfet transistor to high power Mosfet driver

ceech Hardware Contributor last edited by ceech

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:

We need to make a few modifications:

Connect D3 and D4 with a bridge, change a D1 diode with a 1k resistor and connect:

Those changes make up to this schematics:

And here are the signals:

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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Just wanted to say thanks for this, it is still relevant and useful six years later !
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Small Mosfet transistor to high power Mosfet driver

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