Tag: beaglebone

BeagleBone pin layout cheat sheet

I’m not good with memorizing things.

After two weeks of working with it I got bored of reading the BeagleBone manual over and over every single time I had to use a pin so I created this “pin layout cheat sheet” that can be printed and hung on the wall.

Enjoy!

Image

Born of the Firebug rover or an old friend is back

Yesterday we went to our evil genius friend  to ask him to make a new rover for us. Instead of making a new one we ended up reviving an old rover.

This rover was our robot in the competition of Magyarok a Marson 2011 (Hungarian on Mars). The competition was similar to a capture the flag game, with four rovers on the field at the same time.
We weren’t that experienced that time (and our budge was low) so the project failed. We were good in the first round but unfortunately at the second round some smoke has been made and the motorcontroller went to the robo-heaven. Also we smoked an 25A car fuse, yeah something was very bad in our design. We didn’t have the automatic control in time so we used the manual version. In this case we had to use 15 sec delay between two command to follow the rules. We started the blog roughly after two months to the competition. Here is a picture of the rover at that time.
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mjpeg-streamer on BeagleBone

Now that we are done with the platform we have to attach some sensors.
I had some experience with webcams and mjpeg-streamer so I thougth it’s is time to create the BeagleBone version.
I used the latest demo image with 3.18 kernel.
I have an Canyon Wc 23 type webcam(CN-WCAM23). When I plugged it in, the kernel modules and drivers loaded automatically without the need to install anything. You can still make sure that everything went well by typing:

lsusb

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Web interface for a BeagleBone controlled robot

Given a situation where one needs to implement a simple RC interface for a robot. What’s more straightforward? We could create a thick client and implement a server application for the robot but that’s too complicated. In order to have something light-weight and portable I was thinking of implementing the RC interface using some HTML and possibly some cgi.

The outcome of this tutorial will be a webpage that looks like this:


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Building a Rover project day 7 – assembly 2

Since now we have the wifi working, continuing the effort of last time we finally got to do the next assembly step.

Mounting the BeagleBone on the rover.

It was no big deal.

4 screws to fix the BeagleBone onto the plastic board, some tape for a USB hub and some ideas to hide those way too long USB cables somewhere.

The camera is just for prank, we will have to think of a place to put it, and also a way to hide it’s cable.
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Building a Rover project day 6 – wifi

Important note: This steps were validated on the following Angström version:

Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.05-beaglebone-2012.06.18.img.xz

The difference between this and the previous tutorial is that in the new version of Angström they introduced a light-weight network manager daemon called connman. On one hand this makes things easier but on the other hand it renders all the old tutorials unusable.


To see how to get your hardware running with the BeagleBone read this tutorial:
http://wp.me/p1ILL7-9l
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