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Open sequential shifter

LMHDPRO·open-sequential-shifter·hardware/pcb/Shifter/Shifter.kicad_pcb

Open sequential shifter PCB layout, top view — open source ESP32 board by LMHDPRO
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About the Open sequential shifter PCB

Open sequential shifter is an open source ESP32 PCB design by LMHDPRO, published on GitHub under the MIT license. It is a 2-layer board measuring 36.7 × 75.2 mm, with 3 components from 2 distinct parts.

Its main chip is the ESP32-S3-DevKitC, from the ESP32 family. By type, the board carries 2 connectors and 1 IC.

From the project

Rally Shifter Pro is a fully open DIY sim-racing sequential shifter based on a mechanical design sourced from GrabCAD. It integrates a custom ESP32-S3 firmware exposing a native USB HID Gamepad, analog Hall effect sensing (SS49E), and a polished Python desktop application for real-time telemetry, calibration, and configuration.

This directory will contain the PCB design files once completed.

The project currently runs on a breadboard or direct wiring between the ESP32-S3 DevKit and the SS49E sensor. Only 3 wires are required (VCC, GND, signal), so a dedicated PCB is not strictly necessary but would improve reliability and aesthetics.

If you design a PCB for this project (KiCad preferred), please open a Pull Request. See ../../CONTRIBUTING.md for guidelines.

Main components on the Open sequential shifter

ESP32-S3-DevKitC

Open sequential shifter bill of materials (BOM)

3 components, 2 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-DevKitC
U1
2
Conn_01x03_Socket
J1, J2

Open sequential shifter design files

The KiCad project lives in the LMHDPRO/open-sequential-shifter repository on GitHub; these links point at the commit this page was built from.

Open sequential shifter: common questions

What microcontroller does the Open sequential shifter use?

The Open sequential shifter is built around the ESP32-S3-DevKitC, from the ESP32 family.

How big is the Open sequential shifter PCB?

The Open sequential shifter measures 36.7 × 75.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Open sequential shifter?

3 components, from 2 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Open sequential shifter design files?

From the LMHDPRO/open-sequential-shifter repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Open sequential shifter design in my own project?

Yes, under the terms of its MIT license, which LMHDPRO chose for the repository.

Can I test firmware for the Open sequential shifter without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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