Single Sided Really Bare Bones Board Arduino in EAGLE.





Introduction: Single Sided Really Bare Bones Board Arduino in EAGLE.

Paul Badger of Modern Device Company designed the "Really Bare Bones Board" ( and placed the design in the public domain. (Thanks Paul!)

I've converted the design to the EAGLE CAD package, and in the process I noticed that you can pretty much make it into a single-sides board as well, probably not to hard to make using hobbyist materials.

Design files here:



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    1 Questions


    hi, at ftdi input is only 2 yires conected to AtMega, why is not all 4 contacts (vcc,gnd tx an rx)?


    There are three pins from the FTDI (+5, GND, and RTS?) connected via PCB traces on the bottom layer of the board, and two (RxD, TxD) that you need to connect with jumper wires because of the limitations of the 1-layer board. The 6th signal (CTS?) is not used...




    Hello First off Thanks a lot on this link its amazing!!. I need your help though.
    I have downloaded the files and the eagle cad all is working perfectly. I need to know how to print the schematic on a Photo paper so I can later on use it on PCB board .

    How do I find the physical board size in Eagle?
    Or can you tell me the physical outside dimensions please.
    I am looking to get some made.

    In the board editor, you can use the "info" command on the lines in the board outline. The SSRBBB is slightly less than 18x78mm

    This board kind of reminds me of SolarBotics' Ardweeny, except IT'S DIY!!!!


    Um instead of using the AtMega 168 can you just substitute the 328 without any changes to the design? And can you substitute the resonator with this crystal?

    Thanks in advance :)

    Yes, the 328 will drop in with no modifications. If you want to use a crystal, you'll need to also find room for the two 22pF caps that go with the crystal (these are built in to the resonator.) A couple of tiny SMT caps would go on fine, but it would be difficult to find room for more TH components.


    Ok thanks for the quick reply i was just trying to save some $$$ by using a cheap crystal. Thanks for your help. If i wanted to could I just solder the 22pF caps onto the leads of the crystal? Thanks for your help again :)

    A crystal, while more accurate, is not used on the RBBB for cost reasons. Resonators are usually a *lot* cheaper. Unless you go to your local Radio Scam.

    While it is conventional wisdom that resonators are cheaper, I seem to find this to be not very true, at least in small to moderate quantities. Both 16MHz resonators and "typical" crystals are about $0.30 from Mouser, for instance. I like resonators because they're smaller and included the needed caps in the same package, making PCB layout and assembly easier.

    please update the link to the files. I have been looking for this as I will be using my makerbot to mill pcbs and really want to make this.