2 layers85.8 × 94.2 mm
Fault Latch 2
LSUTigerRacing/Electronics
This repository contains all of the KiCad Schematics for the 2026 TigerRacing Formula SAE's Electronics Subsystem.
123 parts8
2 layers71 × 46 mm
This repository contains all of the KiCad Schematics for the 2026 TigerRacing Formula SAE's Electronics Subsystem.
- Size
- 71 × 46 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 18
- Pads
- 90
- Tracks, vias
- 192, 26
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 Jun 2025
- Updated
- 21 Oct 2026
Overview
TTSI is an open-source printed circuit board by LSUTigerRacing, from the LSUTigerRacing/Electronics repository on GitHub. It is a 2-layer board of 71 × 46 mm with 36 parts on 18 nets, routed with 192 tracks and 26 vias.
It is built around the R-78E5.0-0.5, 74AHC1G08GW and 74AHC1G32GW. Its parts include 8 capacitors, 8 resistors, 7 ICs, 6 transistors and 3 diodes.
Main components
3
R-78E5.0-0.5
SIP,11.5x7.6mm-300mA、500mA -5V、5V 1 330uF、680uF 6.5V~36V、7V~31V 81%、90% Buck Short Circuit Protection SIP,11.5x7.6mm DC-DC Power Modules ROHSYLPTECDC-DC Power Modules
74AHC1G08GW
SOT-353-40℃~+125℃ 1 1.5V~3.85V 1.9V~2V、2.9V~3V、3.7V~3.94V、4.4V~4.5V 100mV、360mV~550mV 10nA 2 2V~5.5V 500mV~1.65V 74AHC Series 9.5ns@3.3V,15pF AND Gate Overvoltage-tolerant input StandardCMOS SOT-353 Logic Gates ROHSMDDLogic Gates74AHC1G32GW
SOT-353-40℃~+125℃ 1 1.5V~3.85V 1.9V、2.9V、3.94V、4.4V 100mV、100mV、100mV、550mV 1uA 2 2V~5.5V 500mV~1.65V 7.5ns@5V,50pF 74AHC Series 8mA 8mA OR Gate Overvoltage-tolerant input SOT-353 Logic Gates ROHSNexperiaLogic Gates
README
README.md
This repository contains all of the KiCad Schematics for the TigerRacing Formula SAE's Electronics Subsystem.
Prerequisites
Board Templates
When making a new PCB, if the board is to be manufactured by JLCPCB. import the corresponding board constraints from Board Templates/JLC
Getting Started
This section will walk you through downloading the repository to your computer for the first time. You only need to do this once.
1. Generate a GitHub Token
A token is essentially a password that lets Git on your computer talk to GitHub securely.
- Log into GitHub
- Click your profile picture → Settings
- Scroll down and click Developer settings (bottom of the left sidebar)
- Click Personal access tokens → Tokens (classic)
- Click Generate new token (classic)
- Give it a name (e.g.
git-access), set an expiration, and check the repo scope - Click Generate token and copy it — you won't be able to see it again!
2. Clone the Repository
"Cloning" means downloading a full copy of the repository to your computer.
Open Git Bash and run the following commands one at a time:
git clone https://github.com/LSUTigerRacing/Electronics.git
cd ElectronicsWhen prompted for a password, paste the token you copied in the previous step.
3. Open the Project in KiCad
In Git Bash, highlight and right-click Electronics to open the folder in File Explorer. From there, open the KiCad project file (.kicad_pro).
Contributing
This section covers the full workflow for making changes and submitting them every time you work on something.
[!IMPORTANT] Never commit directly to
main. All changes must go through a pull request.
Step 1 — Make sure you're up to date
Before starting any work, pull the latest changes from the repository so you're not working on an outdated copy.
cd Electronics
git pull origin mainStep 2 — Create a branch
A "branch" is your own isolated workspace. Think of it like making a photocopy of the project — you make your edits on the copy, and only merge it back once everything looks good.
Replace your-branch-name with something descriptive (e.g. fault-latch-rework).
git checkout -b "your-branch-name"Step 3 — Make your edits
Open the KiCad project and make your changes. Save your work when done.
Step 4 — Stage and commit your changes
"Staging" tells Git which files to include, and "committing" saves a snapshot of those changes with a description.
git add .
git commit -m "Brief description of what you changed"Step 5 — Push your branch to GitHub
"Pushing" uploads your local branch so others (and GitHub) can see it.
git push -u origin "your-branch-name"Step 6 — Open a Pull Request
- Go to the repository on GitHub
- Click the Pull requests tab
- Click New pull request
- Set the base branch to
mainand the compare branch to yours - Give it a clear title and description of what you changed
- Click Create pull request
A reviewer will look over your changes. Once approved, your branch will be merged into main and can then be deleted.
PCB Gallery
Fault Latch
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | Q_NMOS_GSD | Package_TO_SOT_SMD:SOT-23 | Q101, Q102, Q103, Q105, Q106 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H101, H102, H103, H104 |
| 3 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C103, C105, C107 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R101, R103, R105 |
| 3 | 641964-1 | CONNECTOR:641964-1_TYC | U101, U102, U105 |
| 2 | 10uF | Capacitor_SMD:C_0402_1005Metric | C101, C102 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R104, R106 |
| 2 | D_TVS | Diode_SMD:D_SOD-123F | D101, D102 |
| 1 | .01u | Capacitor_SMD:C_0402_1005Metric | C106 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R108 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric | R107 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric | C104 |
| 1 | 22u | Capacitor_SMD:C_0402_1005Metric | C108 |
| 1 | 500R | Resistor_SMD:R_0603_1608Metric | R102 |
| 1 | 74AHC1G08 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U106 |
| 1 | 74AHC1G32 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U104 |
| 1 | LM555xM | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U107 |
| 1 | Q_PMOS_GSD | Package_TO_SOT_SMD:SOT-523 | Q104 |
| 1 | R-78E5.0-0.5 | R_78E5_0_0_5 (1):R-78E-0.5_RCP | U103 |
| 1 | RED | Resistor_SMD:R_0603_1608Metric | D103 |
Questions
How big is the TTSI PCB?
It measures 71 × 46 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TTSI use?
36 parts, built around the R-78E5.0-0.5, 74AHC1G08GW and 74AHC1G32GW. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the TTSI KiCad files?
From the LSUTigerRacing/Electronics repository on GitHub, at the commit this page was made from: the board is TTSI/TTSI.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the TTSI design in my own project?
Its repository states no licence, so its author keeps all rights: ask LSUTigerRacing before reusing the design.
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