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Forum needing help to connect a 2-pin rc-car steering motor to an adafruit pwm i2c controller
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  • raspberry pi i2c
  • servo motor
  • i2c
  • how to i2c
  • pwm
  • raspberry pi io
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Related

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

tlucas756
tlucas756 over 7 years ago

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!

image

imageimageimage

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  • beacon_dave
    beacon_dave over 7 years ago +3
    Not sure from the photo if your steering is actually a DC motor or a spring loaded solenoid. Does the steering spring back to centre if the wheels are pushed and let go ? You will also likely have problems…
  • dougw
    dougw over 7 years ago +3
    As Dave indicates a DC motor would need an H-Bridge to reverse polarity. The micro servo might work as a demo but may have problems in actual use. You need to check if the torque is enough, the speed is…
  • ninjatrent
    ninjatrent over 7 years ago +3
    The L293D h bridge will drive this type of motor. It is a very low cost part (US $2). The PCA9685 is for use with servos although as mentioned a circuit can be created. The cheapest and easiest option…
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  • ninjatrent
    ninjatrent over 7 years ago

    The L293D h bridge will drive this type of motor. It is a very low cost part (US $2). The PCA9685 is for use with servos although as mentioned a circuit can be created. The cheapest and easiest option would be to purchase an L293D h bridge.

    https://www.adafruit.com/product/807

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  • ninjatrent
    ninjatrent over 7 years ago

    The L293D h bridge will drive this type of motor. It is a very low cost part (US $2). The PCA9685 is for use with servos although as mentioned a circuit can be created. The cheapest and easiest option would be to purchase an L293D h bridge.

    https://www.adafruit.com/product/807

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