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needing help to connect a 2-pin rc-car steering motor to an adafruit pwm i2c controller

tlucas756

So I saw a neat project on a magazine about controlling an rc-car wirelessly through a raspberry pi, using pwm.

I ordered everything I needed, mainly an i2c controller, and I started working on it. i am using a clone of the adafruit controller instead of a real one, because it was a lot cheaper, though the functionality remains the same.

Now, I have a problem. The article says that I need to connect the steering motor to the 3 pins on the adafruit controller, which are labeled power, ground, and PWM, but my motor only has two wires, so I have no idea what they do, or what to do next.

I do not have another rc-car to do this on. How do I connect the motor to the controller? do I need to get a different motor?

Thank you for your help!

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  • in reply to 14rhb

    Actually I might have misled you there - I didn't notice it was the steering motor you were having trouble with (sorry).

     

    That motor might change polarity to make it turn either direction. It could be that PWM isn't the right solution for that. I think for that you need to put something else between the Adafruit PWM and your motor called an H-bridge circuit. That would allow you to control the direction that the simple DC motor can turn.

     

    Perhaps another E14 member with more knowledge of how RC cars work can comment ?