2024-03-14 EE Meeting
- Jerry Tian
- R D
- Taim Al-Dabbagh
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 or E5 1006
Attendance:
In person | Online |
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Quick Links:
Updates this week!
Announcements/General updates
Team Roster: https://forms.office.com/r/ka0MJHJQ9D . If you are an active member, fill this out (ty)
Competition Participation Interest form: If you're interested in going to competition, please fill out the form below! Note: this does not guarantee a spot at competition.
Director Nominations: If you think you or someone else would make a good exec Director, please fill out the following form: https://forms.office.com/r/FY51bnHZsj
we got $2060 for EE pcb projects
Active PCB Projects
Drone Harness (Neel)
@Neel Patel
Vtx harness may need to change wiring path
new rangefinder arriving soon
High Current Power Module (Taim)
@Taim Al-Dabbagh
Not the most useful results from Power Analyzer tool, except for highlighting peak current density and giving diagram of current density (and voltage drop) through out the circuit
Trying to use TRM, a thermal simulation program. Now figuring out licensing in order to use it and start simulating the board. If curious on what software I am trying to use: https://www.adam-research.de/en/software/
Battery Elimination Circuit
@Ishman Mann
@Jerry Tian to follow up
12S ESC (Mena)
@Mena Azab
6S ESC (Rayyan, Mostafa)
@Rayyan Mahmood @Mostafa Hussein
Rayyan: Almost ready to design all schematics.
Need help in understanding ADC pin connections for MCU
Mostafa: Buck schematic updated with smaller caps, will finish off current sense component selection.
LED Controller (Neel, Parker)
@Neel Patel @Parker Lawrence-Valeriani
The Attiny’s footprint has been corrected
Pinout issue rerouting is done
Discussed with Owen (EFS) about incorporating SpenceKonde onto the board, makes flashing easier
has to flash through rpi for now
SpenceKonde does the above on led board
Researching the posibility of incorporating a barometer into the design to allow for different colours being emitted at different altitudes.
Researching a connector with a better form fit as well as a pull up resistor on reset (just need to do the impedance calculations
PDB (Tom)
@Tom Chiu
Tracking Antenna (Nolan, Hardy, Michael)
@Nolan Haines @Hardy Yu @Michael Botros
Forest is gonna review
fixed a pinout mistake
Final Stages need to Schedule Review
ZP3 Rework (Anthony, Ryan)
@Anthony Zhelnakov @Ryan Scomazzon
PCB done
@Jerry Tian will review before next EE meeting
CAN Interface Board (Hardy)
@Hardy Yu
gg there is a $18 off the shell option
maybe can interface for specific sensors
@Jerry Tian will follow up with Nathan on project scope
Redundant Diversity ELRS , RF project
@Nolan Haines
5V-24V Boost Board
@Allan Liu
First idea is to use TPS61175 to boost to 40V before using buck converter to drop to desired voltage.
This is due to mostly cost, TPS61175 is 6$ whereas something like TL2575 (buck converter) is only 3$, so fair bit cheaper. cheaper than boosting 3 times
Also buck converter will minimize power loss unlike LDO which is good in this case because power efficiency is a concern.
please help out with needs assessment @Nolan Haines @Nolan Haines
Flight Test
Flight test on Saturday 10am
New Projects
Project | Link | Description | Needs Assessment |
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Houston harness schematic |
| Draw houston schematic from scratch. We want a schematic for all possible power + sensor harnesses so that we can quickly build/grab harness for flight test | Wiring is too messy as of Feb 13, 2024. Also sensor harness is gonna be different for different flight tests
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Pegasus harness schematic | https://warg.365.altium.com/designs/EE4130C4-749C-446F-8B89-B208A6919071 | reorganize into hierarchical structure (see 12S servo module example) Label length, color, wire gauge | the schematic as of now is a bit hard to read |
12S ESC |
| Mena needs help ;d | see confluence page |
CAN Interface |
| see confluence page | see confluence page |
ICM 42688 breakout | Could get fancy using CAN bus w/it later but for now just breaking out SPI, and maybe having an onboard voltage regulator or smth (better perf). | EFS is looking to move from bmx160's to ICM 42688's . These are used commonly on all sorts of drones and fc's (probaly the most popular drone IMU being sold new right now). They're about 2$ 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 |