2024-02-29 EE Meeting
- Jerry Tian
- R D
- Ryan Scomazzon
Meeting times:
EE Meeting: Thursdays 8 PM EST E5 1006
Leads Meeting: Monday 8 PM EST E5 2004
Team Competition Aircraft Sync (AEAC): Monday 7 PM EST E7 4043
Attendance:
In person | Online |
|---|---|
| @Ishman Mann @Mena Azab @Mostafa Hussein @Nolan Haines @Nolan Haines @Ryan Scomazzon |
Quick Links:
Updates this week!
Announcements/General updates
WARG will sponsor Remotely Piloted Aircraft System (RPAS) exams, both Basic exam, Advanced exam and Ground school. Please see Internal Licensing & WARG's Flightline Progression Program (FPP) or ping @Anthony Luo https://discord.com/channels/776618956638388305/1154180869775446116 in discord if you are interested.
Active PCB Projects
High Current Power Module (Taim)
@Taim Al-Dabbagh
Battery Elimination Circuit
@Ishman Mann
narrowed down to buck converters or buck controllers
would be nice to have guidance on LTSpice
12S ESC (Mena)
@Mena Azab
Busy this week as well. most likely start on this in March
need to work on
Field oriented control firmware setup to know MCU pinout
microcontroller schematic
gate driver schematic
6S ESC (Rayyan, Mostafa)
@Rayyan Mahmood @Mostafa Hussein
Rayyan: Been busy past couple weeks. Will have gate driver component selection done this weekend.
Mostafa: created buck circuit in Altium, still need to update inductor selection.
LED Controller (Neel, Parker)
@Neel Patel @Parker Lawrence-Valeriani
PDB (Tom)
@Tom Chiu
Found a couple of buck regulators that meet the high current demand with good efficiency and reasonable thermal performance. Looking into switching controller options for safer options though, I am still reading up on them and will add to the spreadsheet: Part Selection Options - Google Sheets. Will note this in the discord when the selection is complete.
Tracking Antenna (Nolan, Hardy, Michael)
@Nolan Haines @Hardy Yu @Michael Botros
Routing is done, no formal design review yet
ZP3 Rework (Anthony, Ryan)
@Anthony Zhelnakov @Ryan Scomazzon
Repicked some parts with recommendations from EFS
Schematic finished, need review @ee leads
1 GPIO pin on connector is connected to ground
Starting with PCB
Capacitor Analysis for Drone (Anthony)
@Anthony Zhelnakov
Has done some research
still need inductance value
worst case load transient on ESC
maximum ripple on ESC
CAN Interface Board (Hardy)
@Hardy Yu
Drone Harness (Neel)
@Neel Patel
Need to shorten power harness on Pegasus
@Anthony Zhelnakov Will make shorter Power Harness only + configuration
Houston wiring needs to be cleaned up
Make VTX harnessing better ie. less janky
Make Harnessing Diagrams
Altium
Diversity Gemini ELRS , RF project
@Nolan Haines
Still doing research, Nolan understands the architecture
on component selection now
Flight Test
New Projects
Project | Link | Description | Needs Assessment |
|---|---|---|---|
Houston harness schematic | Draw houston schematic from scratch. We want a schematic for all possible power + sensor harnesses so that we can quickly build/grab harness for flight test | Wiring is too messy as of Feb 13, 2024. Also sensor harness is gonna be different for different flight tests
| |
Pegasus harness schematic | https://warg.365.altium.com/designs/EE4130C4-749C-446F-8B89-B208A6919071 | reorganize into hierarchical structure (see 12S servo module example) Label length, color, wire gauge | the schematic as of now is a bit hard to read |
12S ESC | Mena needs help ;d | see confluence page | |
CAN Interface | see confluence page | see confluence page | |
ICM 42688 breakout | Could get fancy using CAN bus w/it later but for now just breaking out SPI, and maybe having an onboard voltage regulator or smth (better perf). | EFS is looking to move from bmx160's to ICM 42688's . These are used commonly on all sorts of drones and fc's (probaly the most popular drone IMU being sold new right now). They're about 2$ for a chip, can be pick/placed by JLCPCB, but the eval kits are 58$. | |
Smoke stopper | Analog design. Switch between different efuses (e.g. 1A, 2A, 3A) | The board limits current flowing through when we run the motor test. It protects downstream electronic devices. It also prevents drawing too much current from the batteries.
leads need to decide whether we want a MCU on the PCB | |
5V-24V Boost | See confluence page for details we want output to be adjustable, so boost chip has to handle voltages 12V, 18V, 24V. It is even better if it can also handle other voltages in between 5V and 24V should also bypass 5V | See confluence page |