3D Printable Sequential Shifter Overview
This compact and functional sequential shifter is designed for DIY enthusiasts and simulation setups. It features a modular structure built around two interchangeable stick lengths, allowing users to customize the feel and throw of the shift mechanism. The shifter operates using two end switches that detect directional movement, enabling precise gear changes when paired with a compatible controller.

Control Wiring: The system uses a simple 3-wire configuration:
•     GND: Shared ground connection.
•     Signal 1: Connected to the NO contact of the first end switch.
•     Signal 2: Connected to the NO contact of the second end switch.
Controller Compatibility:
•     Arduino Pro Micro (simhub),
•     STM32 Blue Pill (freejoy).

Parts:

Extension springs 2 pcs length 45 mm.

Central bolt M8X35 mm.

Wood screw 2,5x10mm 4 pcs.

Wood screw 2.5x15mm 4 pcs. 

This setup provides a reliable and responsive interface for sequential gear shifting in sim racing or mechanical input projects.

Here is my Sim racing handbrake on hall sensor.

[https://makerworld.com/en/models/2305741-sim-racing-handbrake-on-hall#profileId-2516953](https://makerworld.com/en/models/2305741-sim-racing-handbrake-on-hall#profileId-2516953)