ESILVA.ORG
Sequential Shifter
This project solves the problem of not having a sequentil shifter for simracing and not wanting to drop a pretty penny on an off the shelf one.
Is it better than the ones you can buy and were designed and manufactured by professionals? *staresintothevoid*
This page is still not finished. Its missing the STLs, the FreeCAD files, the parts dimensions and the code used in the microcontroller.

Design decisions
When I started designing this I wanted to use magnets to repel the shaft back to the center. After around 3 iterations I dropped the idea and went with the more straightforward usage of springs.
The handle is that size and two parts due to the fact that I initially made it hollow to fit 0.05€ coins to stabilize the magnet iteration. The handle was comfortable so I didn't change it.

Parts
  • Screws (dimensions)
  • Springs (dimensions)
  • Endstop switches (what kind)
  • Wire
  • Arduino Micro (or something with the ATmega32U4 chip)
  • USB cable
  • Spacers
  • Washers
  • Threaded Inserts
  • Nuts
  • Screws with bearings at the tip (dimensions)
  • Bearing (dimensions)

Tools
  • 3D printer (or way to get the parts)
  • Soldering Iron
  • Screwdrivers

Assembly
I'm not very good at CAD. The project as of now is a bit of a mess so I will publish it as soon™ as I clean it up. But the assembly instructions are the following:
  • Wire the microcontroller.
  • Install the threaded inserts on the base.
  • Put the bearing on the shaft. Put the spacers and washer on the bold and pass it trough the bearing. Place the rest of the spacers and the washer. Place the nut at the end of the bolt.
  • Put the shaft on the base and place the parts that hold them down. Screw them in.
  • To place the springs force the shaft in the opposite direction and place the spring on the base and slide the other side to its place. Repeat on the other side.
  • Install the endstop switches on the base.
  • Install the microcontroller on the base.
  • Wire the endstop switches.
  • Place the brackets for the screws with bearings on the base. then we can place the screws with bearings and tune them a bit.
  • We can now place the nuts on the base and bolt it down to the base.
    The base in the picture is this: Playseat Challenge accessories bracket

Final product
I was in the middle of upgrading some stuff on my printer when I made this parts so I stuck with a good enough result. For example, on the triangle that the base creates there's a lot of drooping that can be avoided with a tuned machine.

Sequential Shifter