Stuff on the RoboBrrd Brain Board
Here is a colourful annotated picture of what will be on the RoboBrrd Brain Board! This would make a great fridge magnet or something
One of the things I thought would be handy would be to have a shorting block switchey area for both the microcontroller voltage and the servo voltage. This way you can choose what power source you want to run the microcontroller off of, AND if you want the servos to run off of that same power source (from the microcontroller), or from the external regulator. Although with the redesign the servos run fine off the usb power, figured might as well add it in incase someone wants to use even more servos on RoboBrrd!
Crossing my fingers that the onboard 5V regulator won’t heat up too much. It will be interesting to test it out, especially since the copper fill below it should act as a heatsink. The reason why it is facing inwards is because if it was facing outwards, it would be next to the back face of RoboBrrd. This is commonly made out of wood, which I reckon is more flammable than the black plastic used on the headers. Plus, this is where all of the cables will be attaching in, and you wouldn’t want your finger to accidentally slip and burn on the voltage regulator.
Randomly placed picture of the board, here!
Wondering if it will be possible to run this with just a ceramic resonator. I’m not too sure of the quality difference between a crystal and a ceramic one, especially for RoboBrrd. I will find one and desolder it to use with this testing!
There are two ways to input the voltage, the barrel jack will be great with some 5V transformers that plug into the wall. The relief holes I was inspired by the Diavolino. I think I modified the ones on here to be a few more mils smaller or closer … or something like that. These will be great with a small AA battery pack. Totally interested in seeing how long the battery life will be!
Back of the board is kind of boring, since it will be placed on RoboBrrd, I didn’t provide any useful labels. Course, thinking of it now, there should be some for the ‘useful stuff’ headers, and there should probably be some sort of pads for accessing the digital pins, not on the headers.
It would be really cool if this board / layout could be used in other projects as well. The screw terminals are really handy. The artwork may need to change for other purposes though, haha!
In the next RoboBrrd Brain Board v2 post, will be where you can download all the filez, and the post after that will be … whenever I receive the boards in real! They are being fabbed today!