07/19/2023

Weekly Updates

Member

Main Project

Status

Update

Action Items

Member

Main Project

Status

Update

Action Items

@Ari Wasch

Support/Mentoring

  • Helping board bring-up

  • Helping board bring-up

  • Review 24V buck

David Choi

DD Current Sense / Comms

✅🚹

Comms research updates?

 

@Logan Hartford

Lead

  • Board bring-up

  • Made test plans

  • Finish electrical testing

  • finish firmware testing

  • spec out and work with firmware to write firmware

Melissa Jacobs

5V Buck

✅🚹

  • Finished testing on buck

  • did calculations by hand

  • Looking into starting rev 2 schematics

Rayyan

17V Buck

  • Tested on 17V buck

  • Continue testing,

  • look into compensation network values

  • Review 24V buck

@Rishith Bomman

PDB

✅🚹

Any updates on PDB Rev 4.1?

 

@Wolfgang Windholtz (Deactivated)

Science / Support

 

 

@Yuchen Lin

DD Current Sense / Comms

  • Working on interviews

  • Help with 24V buck

Shabd Gupta

24V Buck

 

  • Finished up schematics

  • Review schematic

Muhammad Tanveer

24V Buck

 

  • Finished up schematics

  • Waiting for review

 

Brainstorming Session:

What do we HAVE to do by comp

What do we want to do by the end of term

What would be the most fun to work on

What do we HAVE to do by comp

What do we want to do by the end of term

What would be the most fun to work on

  • Rewire the drivetrain

  • Wire the Arm

  • Wire science mechanism

  • Operational power consumption estimation for all major subsystems

    • Drivetrain

    • Arm

    • Science

  • wiring--need to consult with mech

  • All encompassing architecture diagram -Billy

  • Design buck converters - Billy, Rayyan

    • Talk to Rishith

    • WeBench

  • BLDC Motor controller - David

  • Meetings

    • Bucks

    • Architecture

  • Similar to what an FTDI chip does but in a circuit

    • Need to identify a use case for this

      • RS422 ↔︎ SPI to unify the comms

    • Should try and use a single comms protocol

  • Making our own router

  • New LED matrix board

    • Multiplexed

    • Firmware project

  • Create layers for common IC/s components

 

 

 

 

Priority I Tasks:

Task

Discussion Questions

Answers

Assigned To

Task

Discussion Questions

Answers

Assigned To

Get the bare minimum electrical systems working for the drive train to be able to move
  • What is the bare minimum electrical system?

  • What are all the all the ways we can achieve this?

  • New requirements--Need to power:

    • Jetson - 17V, 10W-30W

    • Gimbal

      • Search up nominal voltage and current draw for gimbal motor

      • Zed2: 380mA @5V

    • Vector Nav - 5V, 250 mA

    • Anenna - 24V 1.5A

    • Pi - 5V 3A

    • What are the power requirements for each of these?

  • Encoders need 5V, mostly a current ref

    • 20mA per encoder

    • 48-5V buck

  • 48V to each motor

  • Apparently the Odrive supplies 5V to the encoders so no need for a buck

Total SAR Power Requirments

17V - 4A
5V - 380 + 250 + 3A => 4A
24V - 1.5A

Rayaan

Validate the OTS BMS
  • How can this be done?

  • How easy of a project is this?

  • 3/5 tough

  • Use resistors divider board to validate basic functions

    • For checking over-voltage?

    • Hook up the cells to the BMS and test basic functions

  • Someone has definitely done battery emulation before

    • google it

@Farris Matar (starting next week)

Create a SOP document for how to charge the LiPo battery pack
  • With vs without the BMS

  • What is the safest way?

  • What is the most convenient way?

  • Any concerns?

  • Should always charge it using a battery charger

  • Have the BMS hooked up as well

  • Connector solution

  • Put safety warnings, storage instructions etc

@Yuchen Lin

Complete Rev 4.1 of PDB
  • Do we have time for a work session this weekend?

  • Yes

Rishith

Validate the electrical functionality of the LED matrix
  • What exactly does this consist of?

  • What needs to be done to verify?

  • Send a digital signal to the neopixels, bitshifts

  • Just need to hit it with PWM to set the colour of the whole thing

    • arduino town

@David Choi / Rishith

/ @Farris Matar

 

  • working on instability issue

    • Should be fine with one antena

@David Choi

Priority II/III Tasks:

Task

Priority

Status

Comments

Task

Priority

Status

Comments

II

Waiting on mechanical/firmware

 

II

Waiting on mechanical/firmware

 

III

Working on priority I comms first

 

II

Working on priority I comms first

 

Active Projects:

Project

Currently Assigned To

Ticket

Due Date

Comments

Priority Level

Project

Currently Assigned To

Ticket

Due Date

Comments

Priority Level

PDB

@Rishith Bomman /

@Farris Matar / Rayaan

PDB Rev4 - Design and Assemble the PDB

Dec 19, 2022

  • Performance testing complete

  • Some small schematic and footprint issues across the board

  • 17V performed well except on start up

  • 5V is very noisey

HIGH

BMS

@Joshua Harper / @Ari Wasch / Olivia

BMS - Design and Assemble the BMS

Apr 19, 2023

  • One BMS has been assembled

  • Basic non-performacne and non-firmware tests have been done

  • An off the shelf replacement is being sourced

HIGH

Comms

@Yuchen Lin / @Logan Hartford

Comms

Oct 31, 2022

 

HIGH

Science

 

Science - Assemble & Test

Apr 19, 2023

  • Need one or two people to own the assembly and testing of the science boards and work with @Ivan Lim and @Wolfgang Windholtz (Deactivated) to ensure the board is ready for competition.

  • Found two assembled boards but none of the parts if @Ivan Lim / @Wolfgang Windholtz (Deactivated) have any ideas please let me know. Otherwise we’ll just order more parts.

  • @Ivan Lim / @Wolfgang Windholtz (Deactivated) Both of the assembled boards are missing a lot of parts, do the boards have a bunch of population options?

MEDIUM

SPI LVDS

@Farris Matar

SPI LVDS - Assemble and Test

Apr 19, 2023

  • SPI LVDS Host boards should have been assembled

  • SPI LVDS Peripheral parts and boards should be in the bay now, pending assembly

  • Harnesses need to be ordered in order to wire them up together and do testing

MEDIUM

RS422

David Choi / @Farris Matar

RS422 - Assemble and Test

Apr 19, 2023

  • @Farris Matar verified the design and was able to send data using the boards

  • 3 Boards have been assembled and tested

MEDIUM

LED Matrix

 

LED Matrix 2022/23

Apr 19, 2023

  • LED matrix has been located

  • Should work, just needs power and a PWM signal

MEDIUM

Digital Display Current Sense Board

@Olivia Markham (Deactivated) / David Choi / @Yuchen Lin

Current Sense Display

Apr 19, 2023

  • Currently in the schematic design phase of the project

LOW