Attendees

1. Thomas Watteyne

2. Austin Patel

3. Jackson Paddock

4. Kristofer PISTER

5. Fil Maksimovic

6. Andrew Fearing

7. Joshua Alexander

8. Martina Balbi

9. Said Alvarado-Marin

10. David Burnett

Minutes

• Jackson Paddock

  • Has a working BAG2 script for low drop out regulators. Demonstrations in 65 nm TSMC

  • Has a schedule for his MS - code freeze 1 week, write for 2 weeks, 1 week for feedback

• Austin Patel

  • dev board updates

  • McCoy: nothing is not working

    • Austin Patel has some suggestions for changes to Andrew Fearing

    • how to operate IMU off battery? IMU VDD and DVVIO need 1.7V, battery only supplies 1.55V

    • regulator? how to integrate with Anju’s batteries (4.2 to 3V is the range for her batteries)

    • Kristofer PISTER : simplest setup to get people up and running → having wire power is fine. PoC with wires is OK (e.g. virtual keyboard). Let’s not try to put too much, do as simple as possible.

    • battery holder for SR416SW: only SCuM works. If you want to run the IMU, connect an external 1.8V power source to a pair of pins

    • antenna options are

      • chip antenna

      • pin

    • Kristofer PISTER : for PoC probably fine to have the antenna trace to a through hole for a header, connect a wire to it.

    • Fil Maksimovic agrees, chip antennas on chip antennas should not work. MIMSY is the counter-example. Simple wire on the through hole in the past has worked pretty well. We could so some antenna testing in the Inria anechoic chamber.

    • David Burnett : reason for a chip antenna is that have experience with OpenMote chip antennas

  • large board

    • shows picture of fully assembled board

    • 3wb programming, power, radio working all works

    • one issue: if no Teensy or USB, providing 1.5V VBAT (Vin floating), see 36uA current draw, expects 350uA