Attendees

@Andrew Fearing
@Thomas Watteyne
@Joshua Alexander
@Jackson Paddock
@Said Alvarado-Marin
@Kristofer PISTER
@Austin Patel
@Fil Maksimovic
Carol Yan
@Razanne Abu-Aisheh
@Alex Moreno
@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 Patel@Andrew Fearing@Joshua 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?

17-Feb-2021

Attendees

Action items

Minutes