Comments: Experiment Guide for RedBot with Shadow Chassis

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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • -------------------- Tech Support Tips/Troubleshooting/Common Issues --------------------

    Reverse in Experiment 7.3?

    If you are having issues trying to reverse in "Experiment 7.3 - Driving a “straight” distance", try modifying the comparison operator on line 85) by changing:

     while (rCount < targetCount)
    

    to

     while (rCount > targetCount)
    

    The issue also might be relative to how the wires were connected to your motor driver.

    **Wireless Remote Controlled RedBot with XBees **

    If you are trying to use the Wireless Joystick to control the RedBot with XBees, I have some basic example code listed here. Compared to experiment 9, the code does not handle the motor's intensity:

    If you are using the example 1 from the Wireless Joystick Hookup Guide, you just need to remove the character padding and adjust the motor values used for the RedBot.

  • My program wont let me change the pins the encoders are set to, Any ideas on how to fix it?

  • I made a processing sketch to take comma-separated values from my "Inventors kit for Redbot" and produce an on-scale 3d representation of the robot's pitch and roll (from accelerometer) and wheel positions (from encoders).

    I have to say that the pitch and roll axis are very accurate but the yaw axis is very jittery (which is understandable without a dedicated compass).


If you've found a bug or have other constructive feedback for our tutorial authors, please send us your feedback!