2024-09-25 Electrical Meeting

Attendance

General Updates

• Check out Conops for AEAC! Get involved in comp syncs for discussion https://www.aerialevolution.ca/annual-student-competition/

  • We decided to not do SUAS since it costs time, manpower, money, late conops.

  • Summary

    • Happening May 9-11 in Medicine Hat, Alberta

    • Aiming to do a full simulation Nov 8

    • Phase one January 15

    • Phase 1 Proposal, 2 is competition

      • Task 1

        • Detect a fire in the distance (red balloons ), Identify hotspots (IR beacons), Visually identify what started the fire

    • Task 2

      • Transport water from a source tank to the locations of the fire hotspots and deposit

• Successful Flight test on Saturday!

  • https://discord.com/channels/776618956638388305/1281721899906367519

  • 2024-09-21 Pegasus 2 Maiden Flight

  • First flight on new drone!

  • Big step since made changes without testing.

  • Some hiccups but they got ironed out.

• Another test next Saturday:

  • Range/Speed test: https://discord.com/channels/776618956638388305/1287116296609202336

  • Obstacle avoidance test: https://discord.com/channels/776618956638388305/1283890207287935018

  • Lots of prep for these, get involved in the threads above if interested

  • Usually in mornings

• Competition Architecture Sync: weekly Thursday at 8 PM in E5 2103.

  • Last competition sync: 2024-09-18 Comp Arch Sync - Meetings - WARG (atlassian.net)

• Fixed Wing Architecture Sync is on every other Wednesday at 8 PM in E5 2103

  • More on fixed wing below

• Successful Work session!

  • ESC Can Adapter assembly done!

    • just some validation left

      • checking for shorts

      • checking LDO pwr

  • Tracking antenna assembly mostly done

    • validating buck

    • fixing efuses

• Work session next week Sunday @11AM in the bay

  • Plan:

    • Assemble LED boards

    • Assemble RPi Rev B board

    • Validate tracking antenna

• EFS workshops:

  • Not directly EE but still can be useful

  • Sept 30th: Datasheets and Protocols, led by @Sahil Kale

  • Oct 7th: Job Search & Interview Strategy, co-led by @Christopher Chung and @Sahil Kale

    • Chris is an EE advisor

  • All workshops will take place from 8pm to 10pm in E7 5353

• Lack of pilots next term - Reach out if off stream and interested

  • Consider the commitment.

Reminders

• Don’t forget to fill out the team roster: Microsoft Forms

• If you are on a project and can use some help, reach out and you can be a PM for the project.

• On Mac? No problem: Altium & Windows - Electrical - WARG (atlassian.net) reach out to @Jerry Tian if you run into problems

Board bring up Status

Bring-up Tasks

In order of priority.

• CAN DSHOT Controller

  • ESC CAN Adapter Test Plan

  • need to deliver to EFS to test the CAN circuit

  • will solder BM06 connectors on during friday sesh and validate LDO

  • when will this be ready

• Tracking Ant Controller

  • https://uwarg-docs.atlassian.net/wiki/x/CQA7ow

  • need to deliver to EFS immediately

• RPi Interface Rev B

  • https://uwarg-docs.atlassian.net/wiki/x/BoAwow

  • need to deliver, ideally done this weekend so autonomy can test before next weekend

  • Daniel will participate in session for sure but would be nice if someone here to PM

• Peggy 2 Lighting Board Rev 3

  • https://uwarg-docs.atlassian.net/wiki/x/BYAzow

  • validate CAN circuit with CAN DSHOT Controller before assembling this

  • let’s assemble the bottom side this weekend?

  • other side need to wait for LCSC order

  • Daniel will participate in session for sure but would be nice if someone here to PM

• Single Servo Module

  • https://uwarg-docs.atlassian.net/wiki/x/HgA4ow

  • for fixed wing, assemble before midterms

• 6S Servo Module

  • 6S Servo Module Test Plan

  • for fixed wing, assemble before midterms

• 12S Servo Module - Electrical - WARG (atlassian.net)

  • @Jerry Tian

  • On hold to focus on comp critical Peggy 2 tasks.

  • Status update:

    • 2nd board is not seeing any voltage on buck vout, while 1st board was fine.

    • would like to run battery inrush test at Vin, see Efuse and Battery Inrush test plan

    • most likely is my soldering skill issue, feel free to take a look if you’re interested

Peggy 2 Updates

@Jerry Tian

updates: Installed range finder with @Ian Van Den Steen , no issues reported

no blockers so far

plans going forward:

• Order IR filter @Ryan Scomazzon by Sep 27, 2024

  • doesn’t solve

  • need new solution

• Install video system @Jerry Tian by Sep 30, 2024

  • after this weekend’s flight test

• Bring-up lightning boards

  • this weekend

• Bring-up rpi rev b boards

  • this weekend

• Installing PCBs

  • next Friday

Fixed Wing Updates - Fixed Wing 2025 - SysInt - WARG (atlassian.net)

• R&D Project

• First meeting of the term this week

• Board updates above

Bootcamp Updates

• Congratulations to @Ahmed Osman and @Sam Zhang for completing the bootcamp!!

• Minor changes for future bootcampers:

  • Reviews will now be conducted over discord voice chat and are meant to serve as a discussion about the boards design and possible improvements

  • Please ping @Parker Lawrence-Valeriani when you’re ready for review

• Feel free to send any questions you may have!

• Best of luck!!

Design Tasks

In order of priority. These are the active design projects.

• RPi Interface Rev C - Electrical - WARG (atlassian.net)

  • @Daniel Puratich Project Manager, Principle Hardware Engineer

  • @Siddharth Muralikrishnan @Ahmed Osman @Anthony Lazar @Anthony Luo

  • LTE Breakout - Electrical - WARG (atlassian.net)

    • Canceled, now part of RPi Interface Rev C - Electrical - WARG (atlassian.net)

  • green tasks need to be done → need a lot of new components for this board, anyone is welcome to take them, but I actually need these done

• 12V -> 5V @ 4A Buck Converter + ELRS Board - Electrical - WARG (atlassian.net)

  • schematic almost done

  • @Kenny NaEngineer

  • @Daniel Puratich PM

• 24V->5V @ 5 A Buck Converter Board - Electrical - WARG (atlassian.net)

  • @Robert TangEngineer

  • @Kevin Li PM

• Unified Video System - Electrical - WARG (atlassian.net)

  • @Tom Chiu Individual Contributor

  • Layout in need of revamp

    • New stackup will be

      • L1 - SIG/PWR

      • L2 - SIG/PWR

      • L3 - Uninterrupted GND

      • L4- SIG/PWR

    • Moving all signal traces from L3 to L2

    • Will create isolated GND beneath buck on L2 and keep all routing away from it

    • Looking to use many more via transitions to ensure that the signal traces do not lose reference.

    • Looking to remove some of the decoupling caps on the buck to save space

    • Looking to source a smaller linear regulator for the 12V-5V step down to save space as the current one is overkill based on the required power draw from it.

• 12S ESC - Electrical - WARG (atlassian.net)

  • @Ethan Abraham Individual Contributor

  • Finalizing schematic

  • Pending items

    • Source and implement oscillator

    • Source and implement 60V TVS diode

    • Discuss/confirm DSHOT/programming connector interfaces

    • Add testpoints for more nets

• ELRS Redundant Diversity RX - Electrical - WARG (atlassian.net)

  • @Nolan Haines Individual Contributor

• Sensor Cluster - Electrical - WARG (atlassian.net)

  • @Michael Botros

Potential new project: Test Automation

• Needs Assessment (comparing to the manual test procedure we have rn):

  • 1. characterize our custom buck converter’s performance.

  • 2. understand our designs more, help ee members learn

    • Load transient test is helpful on identifying issues if downstream board is brownout during flight test

    • Knowing efficiency of the bucks

  • 3. efs running out of work to do

Potential new project: document pegasus harness diagram

• connector part numbers

• wire lengths

• wire guage

• good for new members to learn about our system

Action Items

This section is here for completeness. If a new task is assigned in a meeting, it will be added here.

• order 28 or 30 gauge wire

• order thinner solder