If any of the info on this website was useful for your projects or made your head spin with creative ideas, and you would like to share a token of your appreciation- a donation would be massively appreciated!

Your donation will go to my Robotics Fund, straight towards more sensors, actuators, books, and journeys. It takes a lot to continue building these robots, and I’m really thankful of everyone who helps encourage me along the way.



“A wise robot once said to me through Serial.println- that robots teach us about ourselves.”

RoboBrrd Brain Board v2 – Open Source under CERN OHL v1.1

Having various projects open source is a great learning tool. I probably wouldn’t have been able to make anything if there were no open source gEDA projects (Evil Mad Science makes a lot of open source projects that use gEDA), or wouldn’t be able to make an Arduino derivative if it wasn’t open source, or wouldn’t have been able to check my voltage regulator circuit against an experts circuit!

My goal for making the RoboBrrd Brain Board v2 open source is: someone will see the board with the artwork, want to put their own artwork on it, realise that it is possible, and learn all about schematics pcbs geda and bash in the process. Of course, hopefully they post a pic up online of their own board too!


The RoboBrrd Brain Board v2 is open source under the CERN OHL v1.1. Here you can find the RoboBrrd Brain Board v2 files!

Hopefully nothing is forgotten in the credits. If there’s something messed up in the credits, let me know so I can fix it!


The RoboBrrd Brain board is based off of the Arduino Uno R3 by the Arduino team. It’s a really cool board that is a lot of fun, you can find out more about it here:

We looked at the Diavolino by Evil Mad Science a lot for making the RoboBrrd Brain Board as theirs was created in gEDA too. The Diavolino information can be found here:

For some of the symbols and footprints in the schematic and pcb files, we used Matt Pandina’s version. You can see his .sym’s & .fp’s in here:

For some other symbols and footprints, they were from gEDA Symbols. A variety of these were used, and the authour information should be within their footprint or symbol. Check out gEDA Symbols here:

For our voltage regulator circuit, we looked at the Menta design from Adafruit Industries. Especially the 3.3V regulator section of the circuit and the capacitors. Here is where you can find out more about the Menta:

The first few prototypes of the RoboBrrd Brain Board v2 were fabbed at the OSH Park! Their boards are purple and gold, and it’s a great service. Check it out here:

The medium sized OSHW logo on the board is from the gEDA format of logos that Windell Oskay made. You can find all the logos here:

Finally, credit to the whole maker community for being fun, cool, and helpful with answering questions & learning more!

Here are some things with the files that would be good to know:

– The BOM included was just generated from the netlist, and it may not have the values of the jumpers and misc parts. It does have the resistors and capacitors values, though.

– The schematic is a little ‘all over the place’ compared to others. It kind of grew wildly as I was adding some things to it, and I didn’t make it very neat.

– Oh yeah, I haven’t tested the board in real life since I don’t have the board yet! So it may not work at all. :p

– If something is missing, let me know so I can fix it up

I tried to read the TAPR license and the CERN license many times, but reading this type of document is quite challenging for me. See, they write the document thinking that the way it will be read is from one line to the next line. This is incredibly annoying, since I read right-left-bottom-top-middle-left-upsidedown and not in order. Oh, and the TAPR license starts off with a huge preamble book that you have to read through, so by the time you reach the actual license part, you’re already super tired.

Since I couldn’t figure out what the differences were, I chose CERN because it’s more modern, they are working on v1.2, the Adafruit raspberry pi plate uses it so it was a good example (and they are experts so they hopefully know what is happening), and the logo is very cute. It would be nice if in the future each license would be required to make a human-readable form.

The above is just my opinion on the licenses. I don’t mean any offence to one license or the other, or whoever made them.

The next RoboBrrd Brain Board v2 post will be when I receive the boards! I can’t wait for that, pretty excited!

1 CommentLeave a Comment

  • Aubrey Montoure

    4 years ago

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