description may change

Lessons were learned from my first handbrake: Rubberbands don't last long when scraping against PLA. PLA is surprisingly strong.

So I re-designed it from scratch with the goal of making everything 3D printable. Add to that more experience with Fusion360 and the result is a much sleeker looking peripheral.

Original description:

Not happy with analog handbrakes being a pricey investment for us mid-tier sim driving enthusiasts, and all of them designed for racing. I set out to make this.
It features the ratchet locking mechanism and button release of road vehicles (even gives the sound and haptic feedback of one). But simply by removing the pawl's rubberband, it will turn into a drifting brake. A little bit more involved this time around. The pawls should be clicked off the lever when used as a drifting brake.

What's different/new:

• Fully printable. No screws or other bits and pieces required.
• Two pawls, because it looks better. Better force distribution.
• Sleeker, less wide. Pawl rubber band hidden away in handle.
• Rubberband tension can be adjusted in a spindle. No more looping and piling rubberbands to get the right feel.
• Rubberbands only rub against the hook surface, and should have a much longer life time.
• The sides are put in from the top of the base, and locked in base with two beams. This prevents them from being pushed out the bottom when heavy pull is applied.

Non-3D-printed parts:

• Good quality rubberbands (perhaps some bicycle tubing?)
• WH148 ≤10k potentiometer. And wires
• Teensy arduino board (~16$)

Assembly

Where the pieces go: https://youtu.be/Ace787pmuec

• The potentiometer needs to sit firm. So wrap some tape around it till it does.
• Rubberband for the lever is put on the spindle before insertion.
• Rubberband for the pawl is wrapped around the rod till you get a tiny loop you then hook onthe front.
• Copy/Paste programming the Teensy

Let me know how everything fit. I've not done a lot of reprinting to find the perfect tolerances.