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2 layers63.9 × 45.1 mmJosh SafetyCircuit, the printed circuit board in 3D

Josh SafetyCircuit

LSUTigerRacing/Electronics8

This repository contains all of the KiCad Schematics for the 2026 TigerRacing Formula SAE's Electronics Subsystem.

Size
63.9 × 45.1 mm
Copper layers
2
Thickness
1.6 mm
Parts
63
Nets
34
Pads
171
Tracks, vias
426, 491
Pours
23
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
21 Jun 2025
Updated
21 Oct 2026

Overview

Josh SafetyCircuit is an open-source printed circuit board by LSUTigerRacing, from the LSUTigerRacing/Electronics repository on GitHub. It is a 2-layer board of 63.9 × 45.1 mm with 63 parts on 34 nets, routed with 426 tracks and 491 vias.

It is built around the 74AHC1G86SE, LM1117DT-5.0 and 2N7002K. Its parts include 19 resistors, 13 transistors, 9 capacitors, 7 diodes and 6 ICs.

Main components

3

README

README.md
TigerRacing Logo


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.

  1. Log into GitHub
  2. Click your profile picture → Settings
  3. Scroll down and click Developer settings (bottom of the left sidebar)
  4. Click Personal access tokens → Tokens (classic)
  5. Click Generate new token (classic)
  6. Give it a name (e.g. git-access), set an expiration, and check the repo scope
  7. 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:

sh
git clone https://github.com/LSUTigerRacing/Electronics.git
cd Electronics

When 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.

sh
cd Electronics
git pull origin main

Step 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).

sh
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.

sh
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.

sh
git push -u origin "your-branch-name"

Step 6 — Open a Pull Request

  1. Go to the repository on GitHub
  2. Click the Pull requests tab
  3. Click New pull request
  4. Set the base branch to main and the compare branch to yours
  5. Give it a clear title and description of what you changed
  6. 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

FaultLatch

Parts

63
QtyValueFootprintReferences
1210kSC:CRCW0805R1, R3, R5, R7, R9, R11, R13, R15, R16, R17, R18, R19
122N7002KPackage_TO_SOT_SMD:SOT-23Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12
71kSC:CRCW0805R2, R4, R6, R8, R10, R12, R14
7LEDSC:HL-PSC-1608U52GC-G4D1, D2, D3, D4, D5, D6, D7
6100nCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC1, C2, C3, C4, C5, C116
574AHC1G86Package_TO_SOT_SMD:SOT-23-5_HandSolderingU1, U2, U3, U4, U5
4MountingHoleMountingHole:MountingHole_4.3mm_M4_DIN965_Pad_TopOnlyH101, H102, H103, H104
3, ,
10.33uCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC115
11053131202SC:CONN_SD-105313-100_02_MOLJ1
11053141312SC:CONN_SD-105314-100_12_MOLJ2
11uCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC114
147uCapacitor_SMD:CP_Elec_6.3x5.4C113
1LM1117DT-5.0Package_TO_SOT_SMD:TO-252-3_TabPin2U6
1Q_PMOS_GSDPackage_TO_SOT_SMD:SOT-523Q107

Questions

How big is the Josh SafetyCircuit PCB?

It measures 63.9 × 45.1 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Josh SafetyCircuit use?

63 parts, built around the 74AHC1G86SE, LM1117DT-5.0 and 2N7002K. 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 Josh SafetyCircuit KiCad files?

From the LSUTigerRacing/Electronics repository on GitHub, at the commit this page was made from: the board is Safety circuit PCB/Josh_SafetyCircuit/TEST.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Josh SafetyCircuit 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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