Rennkraft Vortex DIY Racing Simulator Wind Sim

The Rennkraft Vortex is the first easily acquired and built wind sim on the market for cheap. Using easy to source parts and a carefully thought out design, this project is the perfect step to take your rig’s immersion to the next level.

Wind simulation boosts the sense of speed because it makes the car feel like it is fighting the air, not just rolling over the track. As speed climbs, stronger wind, subtle left/right strength corrections, and aero effects trick your brain into feeling velocity and tension throughout a race. It helps fill in the gaps for many of the G-forces we don’t feel when sim racing.

Rennkraft DIY Sim Discord Community
https://discord.gg/gSMXAJWGpV

Included in this design are detailed instructions, as well as a high quality enclosure for the required electronics with pre-cut areas for them to slot into for the cleanest finish and easiest build possible.

Parts required:
L298 Motor Driver ($6.63 for 2)
https://a.co/d/eGgfdvO

USB C Arduino Pro Micro ($7.59)
https://a.co/d/bxSpxC4

LM2596 Buck Converter ($4.95 for 2)
https://a.co/d/6uhGZnT

3* GX12 Connector Set 2 Pin ($6.52 for 10)
https://a.co/d/3jqrzix

2* 120mm High CFM 24V DC Fan ($14.24 for 2)
https://a.co/d/jkVVsh9

24v 1-2A DC Power Supply ($7.99)
https://a.co/d/1ScTGdG
*It is important that you do not use a power supply over 2a. You will fry the motor controller. Ask me how I know :)
Power supplies can also be reused from other things as long as they are 24v at 1-2A.

4* M3x6-30mm Countersunk Screw

Misc wires for connecting microcontroller with motor controller
~22AWG wire for connecting fans from controller box to where they sit on your rig OR 2 conductor pre-sheathed wire (like this: https://a.co/d/4f5AFwF)
Optional cable sleeving for aesthetics.
USB C cable for connecting pro micro with your computer.

Note that you do not have to use exactly any of these parts sourced from amazon. The electronics must be the same kind (l298n, pro micro USB C, LM2596) but you are free to source them from elsewhere (aliexpress, etc.) to find them for cheaper or more easily in your country. Fans must be 24v 2 pin DC (NOT PWM) and keep them close to 100cfm (higher is better.) I suspect this project could be done for closer to $30 if you order with care.

Tools needed:
Soldering iron
Multimiter (For setting buck converter voltage, EASY!)
Heat shrink (Optional but recommended)

It is HIGHLY recommended that you use an air straightener to improve the efficiency of the air leaving the fan. Noctua has a free file that is engineered by literal airflow engineers that is the best out there. This will focus the air coming out of the fans significantly so you feel the flow much stronger. Thanks Noctua!
https://www.printables.com/model/887071-nv-aa1-12-airflow-amplifier

You also must figure out how to mount your fans to your rig. Be creative and look around for options that suit your use case. The internet is huge and chances are someone out there has done something for basically exactly what you have. I zip tied my fans to my rig and it works great.

Not very important. Print orientations are easily implied. No supports necessary.