Modular Programmable gear shifter

Building it will need a bit of coding experience. I will release my code, but there is practically no way it will work perfectly on others, as it needs calibration based on how many gears it has and what potentiometers it is using.

These are the potentiometers I used: Ungodly long link:
https://www.ebay.com/itm/224194967103?hash=item34330fb63f:g:JosAAOSwumNfh-6a&amdata=enc%3AAQAHAAAA4BnBp3BUqOSDtgO%2BOkIjRKj0v9FFKMXXQ9uqokanQnO7wLzAVmPI4UIP5jxfqxlrH6xW4AZqCVRTBvgK8pOYLXPH1yx%2BCQVkT%2FIhBRpeCP4Urcb%2BZvO2niOBFan45Zdas26XnpDSzteuZqou72Z4vWUyEMWQ1LN3btBMW5JmgdjqVHnnZcc3RNfQqD0VIRjhNuHjZD0mp%2B9olAukn%2BT%2F%2FnFRfpvaXT9RP7y8KDF9esnFZFwq%2BEfXHtrvlWpHU29srmHNCGK9jgIm97mgBadqyWju3nn22%2FY54qx8XUR8IykY%7Ctkp%3ABFBMsvKc5Z9h

I used the Pro Trinket 5V for the coding.

My code will turn gears 1-6 into binary and pressing the buttons 1-3 on your keyboard as binary numbers.
If you are using a different top than the 6speed one, the code will need some modifying. Just ask in the comments