Versions Compared

Old Version 1

changes.mady.by.user Logan Hartford

Saved on

compared with

New Version 2

changes.mady.by.user Logan Hartford

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

Weekly Updates

Member

Main Project

Status

Update

Action Items

Ari Wasch

BMS

⛔

David Choi

DD Current Sense / Comms

✅🚹

Comms research updates?

  • Still on comms research

  • Mech is more high priority

    • Looked into BLDC motor drive

  • ESC isn’t that hard

    • OTS IC, can prototype with Arduino first

    • Look more into the BLDC motor driver thing

    • Comms is good enough for right

    Logan Hartford

    Lead

    ✅

    Rayaan

    5V OTS Buck

    ✅

    Any update on getting started with the DD current sense board?

    Rishith Bomman

    PDB

    ✅🚹

    Any updates on PDB Rev 4.1?

    Wolfgang Windholtz (Deactivated)

    Science / Support

    ✅

    Yuchen Lin

    DD Current Sense / Comms

    ✅

    Any update on the DD Current Sense schematic? Any update on SOP documents?

    Looked into some altium curriculum

    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

    • 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

    ...

    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

    •  Set up 2.4 Ghz bands

    • working on instability issue

      • Should be fine with one antena

    David Choi

    ...

    Project

    Currently Assigned To

    Ticket

    Due Date

    Comments

    Priority Level

    PDB

    Rishith Bomman /

    Farris Matar / Rayaan

    PDB Rev4 - Design and Assemble the PDB

    • 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

    • 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

    HIGH

    Science

    Science - Assemble & Test

    MEDIUM

    SPI LVDS

    Farris Matar

    SPI LVDS - Assemble and Test

    • 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

    • 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

    • 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

    • Currently in the schematic design phase of the project

    LOW