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Topic: Project 9 - problems with motor (Read 1 time) previous topic - next topic


I'm trying to make project 9.

When I press the switch the motor starts.
When I unpress it, the motors continues running decreasing its speed really slowly. Even if I stop the motor (with a finger), it will start again.
If I unplug the battery the motor stops directly.

So, it seas that the mosfet, when I send LOW to gate, the connectivity between the drain and the soruce, instead of stopping, is decreasing gradually.

Any thoughts on what may be happening?



Hi mateuyabar

What type of MOSFET are you using?  What is its part number?


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I bought the Arduino Kit,
The mosfet is: IRF520 http://arduino.cc/documents/datasheets/MOS-irf520npbf.pdf


Hi, I am having the exact same problem, mateuyabar.  Did you ever get this to work right, or at least figure out why it is doing what it is doing?

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