Attendees

Minutes

small board review (@Andrew Fearing )
- happened Apr 13, 2021
- @Andrew Fearing designed McCoy v1.1 based on feedback
- pins for all GPIOs 0-15
- antenna pins removed, as well as extra resistors
- 2 layers
- antenna: current same .1 inch through hole?
- discussion about which to use battery
- additional remarks
  - @Austin Patel GPIO1 can output optical data, GPIO8/GPIO9 is active light/low, we want to be able to short GPIO1+GPIO8, ten GPIO1+GPIO9 to be able to do lighthouse.
    - we could drop of the GND pins and rewire two extra GPIO1 signals to pins
  - moving the pins from J5 into J4 (GPO_ZERO)
  - make sure pins on J4 are enough to connect to an nRF52840
BigBoard review (@Joshua Alexander )
- Teensy pins plus GPIO pins
- 22 pin header, aligned to the Teensy pinout
- discussion about how both Teensy and nRF52840-DK can be used, using the same ribbon cable, to program both the McCoy and big board
- J10 is used for current consumption
- suggestions
  - suggestion to group pins into a small number of pins
  - have ADC in close to the development region
- Need to consider drive voltage on IMU: expects 1.8v but Teensy runs at 3.3v
General board development considerations
- QFN package to avoid wirebonding headaches
- QFN mounting may have had contact issues in the past; email chain started
- Planning to manufacture current boards with SMT assembly first, wirebonding second. Waiting on responses from QuikPak to confirm.