The project was created at the request of my 8-year-old son - a fan of car driving simulators. Due to other responsibilities, it took me about 14 months.
For construction, I used mainly what I had in the garage - eyelet plates for connecting wooden constructions are the foundation for mechanisms. The fi8mm roller comes from an old printer. Springs mainly found at the junkyard. I had to buy bearings and joints at the auction site. The top plate is 3mm aluminum. I cut the pattern using a drill, jigsaw and files. The print is a colorless varnished thermal transfer. I mounted the plate with switches and divider resistors on the springs (flexible suspension). I put the details of the construction in the pictures and on the attached film.
Electronics are Arduino Pro Micro (Atmega32u4). I downloaded the software from:
https://steamcommunity.com/sharedfiles/filedetails/?id=661687410 by Hosenfuhrer, but I had to add button support (engine start, lights, wipers and others) and I did it using one Arduino analog input. The software enables connection of a proportional (analog) hand brake and clutch pedal. The device when connected to the computer is seen as a joystick and does not require installing the driver.
Switching on the gear causes the microswitch to be short-circuited, and switching off opens it and forces the simulator to neutral.
Structurally, my shifter resembles the one produced by FREX, but I did not model on it (only after completing the construction I realized that such a product exists).
I made a piece of plywood to fix it to a "coffee" table so that the whole was rigidly fastened.
The arduino code is attached.
Cool? Ranking DIY
You constructed it interestingly, e.g. a roller that jumps over bolts to give you the feeling of throwing in and dropping down. Just a revelation 
