2025-01-23 Electrical Meeting

Agenda

In person	Online

In person	Online

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
- Microsoft Forms
- Must fill by Jan31st if interested
Work sessions
- LAST CALL!
- LettuceMeet - Easy Group Scheduling
Start of term board order
- Waiting on ELRS redundant diversity RX
- cutoff date this friday
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 ?

TURN OFF DMMs WHEN DONE
- They are all dead :(
Competition Interest FormMicrosoft Forms
- Closes Jan 31st
Don’t forget to fill out the team roster: Microsoft Forms
Make sure to clean up after yourself
Get the electronsite role if on site - reach out to @Ryan Scomazzon if you have issues
Competition syncs Mondays at 9pm
Eclipse sync Tuesdays at 8pm
Reach out if you need help on a project or bootcamp
Recruit your friends!
- More fun with friends
- If you like the team, then we can do even more with more people!

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

Jerry demoed TinyCAD for harness diagrams, we are on board
- @Kenny Na to begin work on diagram this weekend hopefully
- Going off of new system diagram Jerry made
- Using the XT60 2+4 connectors
Need to order XT60 2+4 connectors so they get here early Feb ideally
- @Ryan Scomazzon on getting the best shipping times
12V -> 5V @ 4A Buck Converter + ELRS Receiver board 1 & 3 not working, board 2 link drops
- Need to order extra SX1281 RF IC & U.FL connectors to diagnose if it was an assembly issue
  - booting up without an antenna connected may have killed LNA due to high-Z power reflection
    - there was no firmware when I did this on accident, but it’s still possible…
- Otherwise out of ideas on this one… try different antennas?
- This is just for foam plane right?
Redundant buck - pretty sure finished? Worth checking

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

@Andrew Chai - Research into new PM project?

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 to self: we’ve already ordered the major buck ICs and the STM32

3S ESC @Kenny Na

Tracking Antenna Controller w ELRS@Ahmed Osman@Nolan Haines

Did some math and found a few COTS options, updated confluence page, would like someone to review if the calculations/reasoning is right
PSU is rated for up to 480 W at 12V DC, so for maximum charging capability we would get a convertor that can handle 480 W
- Might be able to get this for ~$50 on AliExpress
- How fast do we care about charging the batteries? (how much power/current)