Pixy hardware example from the kickstarter video

mjorrens · April 17, 2018, 5:23am

In your kick starter video, you have a robot that rolls around and follows/tracks different objects.

I would like to expand this concept to create a bulldozer robot that pushes balls into a central location.

What hardware did you use for the actual robot in that example and can it be purchased? Also, is the source code available for that project?

Thanks,

Marc

Edward · April 17, 2018, 5:23am

Hello Marc,
That was a demo that was pieced together from LEGO Mindstorms (the original version). I believe the code is very similar to the pan/tilt demo, where you have 2 PID loops. In the case of the mobile robot, the there was one PID loop that controlled the heading of the robot, based on the X location of the object, an one PID loop that controlled the speed of the robot, based on the y location of the object.

The pan/tilt code is here:

github.com

charmedlabs/pixy/blob/master/src/host/arduino/libraries/Pixy/examples/pantilt/pantilt.ino

//
// begin license header
//
// This file is part of Pixy CMUcam5 or "Pixy" for short
//
// All Pixy source code is provided under the terms of the
// GNU General Public License v2 (http://www.gnu.org/licenses/gpl-2.0.html).
// Those wishing to use Pixy source code, software and/or
// technologies under different licensing terms should contact us at
// [email protected]. Such licensing terms are available for
// all portions of the Pixy codebase presented here.
//
// end license header
//
// This sketch is a simple tracking demo that uses the pan/tilt unit.  For
// more information, go here:
//
// http://cmucam.org/projects/cmucam5/wiki/Run_the_Pantilt_Demo
//

This file has been truncated. show original

We have this demo working as part of the LEGO version of Pixy. It does a good job of describing how it’s done.

http://cmucam.org/projects/cmucam5/wiki/LEGO_Chase_Demo

Hope this helps!

Edward

mjorrens · April 17, 2018, 5:23am

Thanks Edward.

That is great.

Also, for the community, if there is a good Robot wheeled base (3 or 4 wheels) for Arduino, let me know. I see there are a bunch of options online that cater to an Arduino mount.

Marc