03-Nov-2021

Attendees

  1. @David Burnett

  2. @Joshua Alexander

  3. @Andrew Fearing

  4. @Austin Patel

  5. @Kristofer PISTER

  6. @Alex Moreno

Minutes

  • @Joshua Alexander https://docs.google.com/presentation/d/1-9L8OkVl-w5GmbFYmV3mfrPeIWW8XqER/edit?usp=sharing&ouid=115125070153404772120&rtpof=true&sd=true

    • 1.1 V

      • tap and continuous connection to VDDD resulted in successful scum firmware execution when programmed via 3wb from nRF

        • Gets stuck in optical calibration mode only if programming from 3wb from nRF

    • 1.8 V

      • Four different programming methods were not successful

    • 1.1 V tap results are promising with regard to only needing resistors to generate 1.1 V instead of regulator

      • Use expected VDDD current to size resistor from 1.8 V nRF pin to 1.1 V VDDD via 0.7 V drop over the resistor

  • Still need to make a cohesive picture of voltage ripple with DC/DC converter and printed battery at high time resolution

  • @Kristofer PISTER recommended using a spare Sulu board to analyze 1.8 V DC/DC ripple vs input voltage range over battery discharge range and load current in boot/sleep/TXRX modes

  • Next recommended test is lighthouse functionality verification

  • Very basic sensor ADC test appreciated too

  • PCB assembly revision plan made