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Pi V1.3 test pad dimensions
06/30/2016 at 17:51 • 3 commentsHere are my measurements for the new V1.3 Pi Zero power and USB test pads. I'd love it if anyone else could verify or correct. I also think I made a small error with the vertical dimension for PP22 and PP23 (although we never saw a problem with the original 5 prototype boards).
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Board Up and Running
04/07/2016 at 19:12 • 0 commentsBoard is up and running with a significant amount of testing done. Still need to do full load testing and some signal quality analysis as well as fully test the firmware but it has run in a variety of configurations. So far the only additional change is to add a 22 uF cap.
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Firmware development underway
03/28/2016 at 15:32 • 0 commentsThis is the firmware development board for the PIC. Right now most everything is running except power-down and persistent storage of configuration values to Flash.
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Assembled boards back
03/28/2016 at 15:28 • 0 commentsGot several assembled boards back. And the mistake due to my lack of 3d visualization is all too apparent. You can have 3 USB ports and no HDMI or HDMI and 2 USB ports with this rev of the board... Hopefully start debugging tomorrow.
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Boards Arrived
03/07/2016 at 23:53 • 0 comments"Solar" yellow boards back from IteadStudio. And the realization that I forgot the bypass capacitor for the PIC's on-board USB 3.3 volt regulator. I wonder how hard it is to solder a wire or a tiny 0402 capacitor to the side of a QFN?
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Pi Zero Measurements
02/26/2016 at 17:39 • 1 commentAdded my measurements for the power and USB test pads in case anyone else is interested. Curious if this is what others have found.
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Prototype under way
02/25/2016 at 04:13 • 0 commentsBoards, stencil and parts ordered.