Custom Racing Wheel with Force Feedback containing the wheelbase and steering wheel with the attachments to connect the 2 together. A custom PCB will be used to control the hoverboard motor and read it's position throw a rotary encoder connected to the motor with 2 gears. A Pico 2 is used in the wheelbase to receive data from the wheel(which also has a pico 2) throw SPI protocol. The pico 2 isn't used only for receiving data from the steering wheel, it could also get data from other devices like pedals, shifter, handrbrake and many more. The pico 2 supports up to 6 SPI/I2C connections and also sensors can directly be connected to it's GPIO pins.

The big difference between my racing wheel and others is that mine has direct data transfer throw the magnetic pins from steering wheel to wheelbase which goes in the pc. That means very small latency and no cable twisting all thanks to the magnetic pins (pogo pins) and the slipring. The downside that comes with this is the plastic parts for the high strain parts like the motor extension and the quick release all from plastic(3d printed) but it still should work fine.

I'm making the project so I could inspire others with my design as it's different than most I've seen. And also it's way cheaper than buying a new one with similar specs.

Specs:

• up to 15nm of torque
• fast response time of 1ms(1000hz)
• wheel base is L=20cm, W=20cm(at the corner, max dist) H=17cm.
• steering wheel is 33cm
• the 3d printed case for the steering wheel L=16.2cm, W=3.2cm, H=7.5.
• 12 buttons
• 5 encoders
• 1 funcky switch(for easier customization of the car in games/other actions like camera fix position)
• high precision encoder(for motor)

Wheel final version below

Wheel base

Close image from the steering wheel face

The back of the steering wheel

Simple wiring scheme for the Pico 2 of the wheel base to the wires of the slip ring. The image also includes a simple connections from the pico 2 to some sensors if you want to directly connect any sensor to it.

Custom bldc motor driver PCB

PCB image of it's top copper layer

Steering wheel buttons/encoders will be connected to the pico 2 throw a matrix system in which each button is connected to column and row and the pico 2 will send a signal to each column and then wait for output from any of the rows and that's how it will find which buttons got pressed. This matrix system allows the usage of a high number of buttons without haveing a pin for each button. Also a diode will be used to prevent the current from flowing the opposite direction and causing ghosting. The order in which the buttons are connected doesn't matter so I won't include a photo of that. Also I won't add the file for schematic as it's a very simple schematic which isn't linked to other files and it's used to have and idea how the connections work for who doesn't already know(the wires can be connected to others pins and still work fine).Just don't forget to connect it to the pogo pins which then go to the Pico 2 in the wheel base which will process the data, don't forget to wire the pins accordingly for SPI protocol(example above). The pico 2 of the steering wheel is gonna be the slave while the pico in the base is gonna be the master. Slave awaits commands from master.

Print tips So the parts used to connect the motor to the wheel should be printed with 95% infill, the oher parts should be printed with 15-30% infill as they won't have that much strain on them I m gonna use ASA fillament as it is pretty strong and should do the job well. Also if you are a total beginer you should download only the stl files as they are the only one needed to print the parts.ts.

I used Raspberry Pi Pico extension in VS code which downloads the SDK for pico and other packages automaticly. If you want to use my code for Pico 2 just git clone my project then open the folder with the code you want to upload on your pico, in VS Code (after installing the extension) and just compile, select port of Pico 2 and upload.

Pico 2:

What you need to wire to the bldc motor driver PCB:

PCB BOM Price is around 23 euros for parts only on LCSC website + other fees..

The next 2 BOMS are an aproximation for how much for just one of them. It is not 100% accurate