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2025-01-23 Electrical Meeting

2025-01-23 Electrical Meeting

Owned by Meghan Dang
Last updated: about 4 hours ago by Kenny Na
4 min read

Agenda

  • General updates for this week

  • Flight test

  • Reminders

  • Competition updates

  • Eclipse (fixed wing updates)

  • Project updates

Attendance

In person

Online

In person

Online

@Ryan Scomazzon

@Jerry Tian

@Kenny Na

@Santosh Erathasari

@Megan Lee

@Andrew Chai

@Sam Zhang

@Tim Gu

Magnus Scott (not added to Confluence)

@Meghan Dang

@Ahmed Osman

General Updates

  • Project manager changes

    • @Kenny Na Is now a work session PM and will be organizing/running most work sessions

    • @Jerry Tian Will be the eclipse PM instead.

  • Merch order

    • https://forms.microsoft.com/r/Vuh2jj372G

    • Must fill by Jan31st if interested

      image-20250123-182059.png

       

  • Work sessions SCHEDULED

  • Start of term board order

    • Waiting on ELRS redundant diversity RX

    • cutoff date this friday

    • @Kenny Na to order in person with Sarah on Tuesday

  • Pick&Place machine

    • Discussed at SDC meeting, not really any new info

    • If we want it we can use it.

    • Other leads are fine with us having it in the bay

    • If we still want to set it up yeah but not really useful so just if interested

      • @Santosh Erathasari?

  • Co-ops? (Winter 2025 term)

    • Lowered requirements!

    • winter 2025 term co-op placements were “[awful]”, worst in history

    • 300+ engineering students in need of hire

    • accepting any creative way of getting students co-op credit

    • opening hiring wide open → 4, 5 co-op students, helping on just projects, short terms OK, flex credit possible, unpaid**, will waive in-person requirement**

    • just for this term - not a continuous effort (hopefully spring term is better.)

Flight Test

Reminders

Pegasus/Competition Updates

  • Was testing a new pump, looks a lot better than the old one

  • We will need 12V on the drone.

    • Must check if PDB has enough current for 12V

    • If not we need a 48-12V buck

      • We have one that we made but it blew up.

        • Anyone wanna look into cap filtering?

    • Alternatively we can buy one off the shelf

    • Test 12s power?

    • High current power module? - test

  • Still need to do an analysis on if the pix can support another 1-2 Servos

    • Anyone interested?

    • @Megan Lee

Eclipse Updates

Project Updates

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

@Andrew Chai - Research into new PM project?

  • Battery management system for custom drone battery packs

    • cell balancing

    • firmware required!

  • 12S Power Distribution Board

    • could be in time for VTOL 2026

    • integrate components and reduce harnessing

  • People interested

    • @Sam Zhang interested in both, more so bms

    • @Santosh Erathasari Both cool but prefer PDB

    • @Megan Lee Both look cool

    • @Kenny Na PDB!

RPi Interface Rev C - Electrical - WARG (atlassian.net) @Kenny Na @Daniel Puratich

  • Thanks for final board review @Meghan Dang!

  • Gerbers uploaded to JLCPCB cart, thanks @Santosh Erathasari

  • DigiKey component order coming soon, may order modem + extras early

    • Note: we’ve already ordered the major buck ICs and the STM32, they are on the shelf

12S ESC - Electrical - WARG (atlassian.net) @Ethan Abraham& @Andrew Chai

  • MODAY ORDER YAYYY

ELRS Redundant Diversity RX - Electrical - WARG (atlassian.net)@Nolan Haines

  • like 99% done. doing finishing touches and getting a clear DRC

  • Needs to update rules

  • Trying to get on order

12S Pre-Charge Controller Module@Robert Tang @Kevin Li

  • Needs review!!

3S ESC @Kenny Na

  • Schematic almost finished - need to finish STM32 design

  • Would appreciate schematic review from anyone

    • MOSFET selection & RG value

    • Maybe start with 2.2 ohm, popular value

    • Can talk to farris

  • Layout beginning soon!

  • Estimated completion EOT W25

  • Could use some help with layout, chat in Discord!

    • @Santosh Erathasari interested

    • @Megan Lee

Tracking Antenna Controller w ELRS@Ahmed Osman@Nolan Haines

  • Osman and Nolan meeting this weekend

  • High level architecture done this or next weekend

  • Tasks not ready until next week or the week after

12V Input to 65W USB-PD Source - Electrical - WARG @Ian Van Den Steen

  • Picked out PD arbitration IC and buck boost IC

  • starting on schematic 

12V to 24V Boost Groundside Converter - Electrical - WARG @Tim Gu

  • Did some math and found a few COTS options, updated confluence page

    • Which option to choose depends on PSU

  • We’re using the 12V PSUs that are currently wired to the chargers. What is the output power rating?

  • How much current do the batteries need to be charged with? Charger has 4 channels, up to 15A each

  • Jerry sent photo with details

  • Maybe design for 7Ah at 1C

  • Found some options. Will pick one soon

Water System Controller rev 2 - Electrical - WARG @Shawn Yang

  • MONDAY ORDER WOOHOOO

Open Tasks

  • Peggy harnessing?

  • Pegasus current limit checking

  • Replacing DMM fuze/batteries?

Action Items