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Assembly Checks

  • Verify no connector pins look soldered together
  • Verify no pins on STM32 look shorted
  • Verify pin 1 on chips aligns with indicator

Power Testing

DMM

  • Make sure no power rails are shorted to ground or each other with DMM
  • Slowly increase voltage (with low current limit, 100mA max) on buck input, check its not drawing excessive current/power (ensure no output load)
  • Probe the output net for voltage stability with DMM
  • Slowly increase voltage on internal 5V rail and verify the internal 3.3V rail turns on (LDO functionality)

E-load

  • Perform a load test on buck converter: use an e-load to fully saturate the buck and verify you get the output current expected
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