This repository documents the complete mechanical and electrical design of a DIY force-feedback (FFB) sim-racing pedal system. It is a research-oriented hardware project, not a software application or data pipeline. The repository contains CAD models (STEP, STL, Fusion 360), PCB design files (Gerber, EasyEDA), wiring diagrams, assembly guides, bill of materials, and SimHub plugin configuration files. The design has evolved through multiple versions (PCB V3-V8, mechanical iterations). The repository serves as a comprehensive build guide for hobbyists and sim-racing enthusiasts to construct their own FFB pedals. While it includes some software artifacts (SimHub configs, a PowerShell PDF build script), the dominant character is hardware design documentation. The code quality is minimal and not the focus; the value lies in the detailed mechanical and electronic design artifacts.