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• Electronics assembly day

  Snegovick • 02/15/2015 at 19:11 • 0 comments

  Yay! The electronics is assembled and somewhat tested.

  Here are all the parts:

  It took most part of the evening to make all the wires, connect it together and correct the mistakes, but in the end, it looks like this:

  The "connectivity board" sits on top of msp430 controller board and it really is just a board with soldered connectors on it, connected with wires to appropriate pins. I think that making connectivity board is really important, because directly soldered wires are very hard to modify or even check, compared to connectors.
  

• 3.3V Charge pump

  Snegovick • 02/12/2015 at 01:27 • 0 comments

  I hate etching. No, really, it is boring. But anyway, today was etch-and-solder day. BROVER needs some good old 3.3V for msp430 which will be controlling the engines, so I took MAX1759 and made a basic board for it:

  The only problem left with this dc-dc buck-boost converter is that it needs 0.33uF capacitor for its buck-boosting needs, but I only have 0.22uF, so here is the result:

  Which is a 200mV bump, which is not good. Will have to look for 0.33uF again.
  

• Charging batteries for future mission!

  Snegovick • 02/11/2015 at 00:53 • 0 comments

  Charging 3800 mAh lithiums with 1A takes like ALOT of time. The charger boards are adafruit mcp73833 breakouts/chargers.
  

• Drive wheel

  Snegovick • 02/11/2015 at 00:49 • 1 comment

  Front wheel is powered with a "9g" servo upgraded to run continuously.

  The idea is to rotate this whole thing with another servo mounted on top for steering. Will need some testing on that :)
  

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