2024-10-02 Electrical Meeting

Attendance

General Updates

• New faculty advisor: Brandon DeHart

  • Manager of the RoboHub, and will be attending some of our competition syncs this term to provide technical guidance.

  • Derek Wright was too busy

• Last flight test

  • Speed/Range/Obstacle avoidance

  • Did not test everything due to rain but some retune was done (needs more work)

  • Autonomy data collected

  • buck converter for RPi usb c port broke off

    • was untested

    • known issue with these board with respect to poor solder

• Next flight test

  • This Saturday

  • Testing video system, relay system, geological system, tuning

  • Leave bay at 10am

  • Discord - Group Chat That’s All Fun & Games

  • 2024-10-05 Pegasus 2 & Houston - Flight Tests - WARG (atlassian.net)

• Hotplate ordered - Order procurement sent out for hot plate, will be ordered imminently

• Toaster oven not acquired yet - if you would like to help let me know

• Get the electronsite role if on site - reach out to @Ryan Scomazzon if you have issues

• Can someone return the bmo5 connectors to Sarah’s office (E5 2104) - Andrew

• Midterm board order coming up @Nolan Haines .

• Hot air gun broken - prob fixable?

  • If not see if we can get sponsored for a new one lol

  • Not blowing hot air??????

Reminders

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

• Check out Conops for AEAC! Get involved in comp syncs for discussion National Annual UAS Student Competition - Aerial Evolution Association of Canada

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

  • 2024-10-03 Competition Architecture Sync - Meetings - WARG (atlassian.net)

  • Last competition sync: 2024-09-26 Comp Arch Sync - Meetings - WARG (atlassian.net)

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

  • Not this week

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

• If you are on a project and can use some help, reach out

Meeting Times

Board bring up Status

Please update test plans/board documentation!

Bring-up Tasks

In order of priority.

• CAN DSHOT Controller

  • ESC CAN Adapter Test Plan

• Tracking Ant Controller

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

  • PRIORITY ASAP

    • EFS person bust so we have bought a little time

  • Issue with buck IC

    • Enable pin not working?

    • QFN package causing issues

    • LDO into Buck is working - subsequent systems not working

    • More debugging to come

  • Maybe a short?

  • More testing today, feel free to come!

• RPi Interface Rev B

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

  • 2 boards assembled and tested

  • @Daniel Puratich for details

  • rpi rev b needs software to validate uart killswitch, power is all working as expected on both boards, plz relay to autonomy

• 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

  • Saw small power trace in schematic, tested and it seems fine. Might be worth another rev?

  • Can bring up with what we have

    • conclusion

      • bring up one, test with EFS

      • fix layout, order with midterm board order

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

  • @Jerry Tian

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

Peggy 2/Comp Updates

• @Jerry Tian For Peggy 2

• Tracking antenna discussed above

• Integrated Monitoring and Command Station Requirements (IMACS) - SysInt - WARG (atlassian.net)

  • @Nathan Green Do you wanna talk about this a bit?

• IR filters don’t really work

  • Auto looking for new solution

  • Detect heat?

  • Come to comp sync

• Video System installed on Drone

  • Camera wire length reworked, pending review from Nathan

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

• Reminder: Our newest program

• First arch sync of the term last week 2024-09-25 Fixed Wing Arch Sync - Meetings - WARG (atlassian.net)

• Timeline: Finished end of term

• Mech is cooking, see minutes

• The below boards should be included

  • 6S servo module

    • making new rev to be ordered with midterm board order

  • Single Servo Driver

    • should be good, needs assembly.

  • 6S power module

    • highest risk

      • lowest necessity (RIP lol - Andrew)

  • https://uwarg-docs.atlassian.net/wiki/spaces/ARCHS22/pages/2555904119

Bootcamp Updates

• Continue to pop off and ask questions in your bootcamp thread

General 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 @Shawn Yang

  • coming along, schem long in a week and layout in another week seems doable

  • 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

  • Most components added to Library

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

  • @Kenny NaEngineer

  • @Daniel Puratich PM

  • Layout in progress ~ 1 week, will be ready for midterm board order

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

  • Schematic is under review by Kevin

  • @Robert TangEngineer

  • @Kevin Li PM

  • Placement almost completed

  • Will be ready for midterm board order

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

  • @Tom Chiu Individual Contributor

  • Layout revamped

    • New stackup will be

      • L1 - SIG/PWR

      • L2 - 2 signal traces, but otherwise, all GND

      • L3 - Uninterrupted GND

      • L4- SIG/PWR

    • Rerouted all signal traces on top and bottom layers with many via transitions. 2 signal traces remain on L2

    • I tried to ensure that the 2 traces on L2 did not lose gnd reference signal traces do not lose reference.

    • Removed 2 decoupling caps on the buck to save space.

    • Sourced 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.

    • Please review whenever possible!

  • Worked with Jerry to understand the existing VTX system. Helped a bit with installation and creating the harness for PWM signal from pixhawk to lumenier switch board.

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

  • @Ethan Abraham Individual Contributor

  • Schematic nearly complete. Need to change MCU pinout to abide by AM32 hardware groups

  • Looking for a somewhat experienced EE to handle/help me with layout

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

  • @Nolan Haines Individual Contributor

  • Schematic completed, starting placement

  • Doesn’t need help but might later with routing

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

  • @Michael Botros

  • Schematic done, implementing some schematic feedback from Daniel

    • So far no one else has left any schematic comments

  • Going to start layout likely this week

• Pegasus wiring documentation

  • @Ahmed Osman @Jerry Tian

  • https://github.com/UWARG/hardware/tree/master/Harness schematic is here

Potential new project: Standard connectors fixed wing

• VBat, CAN, 5V in one connector

• Easily have everything together so it is easy to remove parts

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

• Jerry’s is too busy to work on this rn, will be on hold until he is more free

Action Items

@Jerry Tian will try to fix hot air gun, if not successful, he will write email to hakko for help