Attendees

1. Andrew Fearing

2. Thomas Watteyne

3. Joshua Alexander

4. Jackson Paddock

5. Said Alvarado-Marin

6. Kristofer PISTER

7. Austin Patel

8. Fil Maksimovic

9. Carol Yan

10. Razanne Abu-Aisheh

11. Alex Moreno

12. David Burnett

Action items

• Andrew Fearing to get a quote from Gold Phoenix.
• Austin Patel and Jackson Paddock to go in the lab to test the small boards, including UART.
• Kristofer PISTER and/or David Burnett and/or Fil Maksimovic to review the design of the large board with Joshua Alexander .
• Alex Moreno to follow up with Smart Bandage team to see if existing Hornet Slayer board with battery holder will work for them
• Fil Maksimovic to show Austin PatelAndrew FearingJoshua Alexander his 20948+SCuM+battery_holder board design and software that was used to read IMU and send RF packets. Software is in a repo somewhere hopefully?
• Kristofer PISTER to talk to Lydia Lee about whether her new optical receiver will be able to handle Lighthouse 2 signals, and if we have any Lighthouse 2s lying around the lab.
• Assuming NRF testing is successful, Kristofer PISTER to find someone to design a board that plugs directly into the NRF board with no need for jumpers.

Minutes

• small board

  • Austin Patel and Jackson Paddock will be going in the lab to test the small boards

    • Does current look right when applying VBAT

    • Does GPIO0 go high

    • Does optical programming work

    • Does UART work

    • Does RF work

  • we need to rev the small board with a connector for the antenna, so this assembly is just test fundamentals

  • rev the board, given the specifics, costs close to $1k

  • Fil Maksimovic : you could use https://www.goldphoenixpcb.com/

  • Austin Patel to update notes

  • will use optical first, then 3-wire bus with Teensy, then maybe 3-wire bus with nRF

  • Andrew Fearing to get a quote from Gold Phoenix

  • Kristofer PISTER we should review the board review from Joshua Alexander ?

• Carol

  • would like to use small board for smart bandage project

  • can I get a small board?

  • Austin Patel can build a second board

  • discussion about reuse the HornetSlayer PCB for the band-aid. MEng team could use it.

  • Alex Moreno we have rigid board for Hornet as well (on top of the flex PCBs). Plenty of board to test with.

  • Kristofer PISTER maybe we could use a couple of Hornet Boards

• discussion about board design

  • Alex Moreno VBAT, GND, antenna trace

  • Kristofer PISTER : what happened to board from Fil Maksimovic

  • Fil Maksimovic : have design files. Only problem is the contact with the battery holder. Has been solved since?

  • Andrew Fearing the XL on the small board is the the InvenSense ICM-20948

  • discussion about regulator

  • Should test UART as well when testing small board.

  • Alex Moreno indicates had put together battery testing data with Austin Patel

  • Alex Moreno happy to show how does the assembly

• Razanne Abu-Aisheh

  • working on Atlas algorithm, some finalization on the robot simulator

  • deadline for DCOSS pushed to 31-Mar-2021

  • had a presentation about vision for DotBot

• Fil Maksimovic and Said Alvarado-Marin

  • lighthouse 2 reverse engineering

  • looked at the modulated laser from the lighthouse

  • discussion about inter-symbol interference

  • doesn’t konw if anyone has been able to decode lighthouse system on a small uC. Crazifly did it on an FPGA

  • Said Alvarado-Marin connect to the serial console in the back of teh LH2. You can change the mode of the lighthouse. Extracted full list of polynomial. Dump command.

  • discussion about Martina and Andreia

• Said Alvarado-Marin

  • startup voltage of the nRF52840

  • limit on the amount of current the VDD pin can source 7mA max when radio on, otherwise 20mA

    • Fil Maksimovic confirm that’s plenty

    • 1.21 GW not necessary

• SCuM receiving LH2 signal - no info yet?