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- All components on top of board except clik-mate connectors and debug LEDs (also TVS diode and 3 decoupling caps)
- Board dimension target is 5 cm x 5 cm (not of vital importance)
- Mounting holes (M4) on each corner
- Mezzanine connector will be close to the center of the board
- 2-Layer PCB with 1oz copper
Retrospective
- The board worked!
- Kevin's regulator design has not been tested yet, but Titus's regulator design worked well and had minimal ripple and relatively high efficiency under light loads (87% @ 10mA).
- The 1.25mm Clik-Mates were impossible to crimp and we'll definitely need a real crimper for the 1.50mm Clik-Mates that we plan on using.
- Most of our boards require powering the carrier board directly and the only purpose of the 12v rail is to power the regulator, so we can just remove the 12v connector from the controller board.
- The crystals are huge. They need to be replaced.
- The mounting holes are excessively large.
- The QFN chip is actually solderable by hand (Kevin Chen (Unlicensed))
- We definitely need a stencil to do proper reflow.
- The blue LEDs are way too bright.
- We haven't tested the crystals yet.
- We haven't the mezzanine yet.
Revision 2
Design Changes
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