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CHANGELOG.md

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changelog

Note that numbers are skipped arbitrarily based on my whims and fancies.

revision 7.2 (untested)

Previous revision: 7.1

Compatibility:

  • Pinout identical to 6.3
  • New stencil required (different from 7.1)

Changes:

  1. remove I2C pullups from MAX17048 chip; they were frying the MCU IO pins
  2. shrink LEDs to 0402 size
  3. add solder points for metal can

revision 7.1 (do not build -- broken)

Previous revision: 6.3

Compatibility:

  • Pinout identical to 6.3
  • New stencil required

Changes:

  1. add on-board MAX17048 fuel gauge IC for battery monitoring

revision 6.3

Previous revision: 6.1

Compatibility:

  • (Slightly) incompatible pinout: VDDH pin (top right) changed to VDD
  • Stencil / position / parts compatible with 5.17+
  • Underside pads compatible with 6.1

Changes:

  1. Change the VDDH extra pin to be VDD instead; note that it's usually an output, and should only draw a maximum of 25mA (less when transmitting!)
  2. Fiddle slightly with the antenna layout (with ref. to the nRF52840 Dongle from Nordic) even though I don't know what I'm doing
  3. Adjust trace routing around the antenna feed to improve ground plane coverage

revision 6.1

Previous revision: 5.20

Compatibility:

  • Incompatible pinout, bottom pad layout for USB changed (SWD pad positions unchanged).
  • Stencil / position / parts compatible with revisions 5.17 - 5.20.

Changes:

  1. Changed P1.00 to P1.08 (still high drive)
  2. Exposed the old P1.00 as an SWO pad instead (useful for debug trace output)
  3. Changed the VBUS pin to expose VDDH instead
  4. VBUS exposed as an underside pad