Wiring a Single Potentiometer to Use Two 5k Pot Inputs (Arcade)?

[PaulWoodpross3r]

Hi,

This is semi-related because a project like this would be handy for certain home controllers of mine.

Has anyone attempted to wire 2 analog inputs to a single potentiometer in an arcade-related project? I've stumbled upon similar projects like this crossfade circuit here that appears to be for amplifiers: http://rasteri.com/wiki/Crossfader_circuit

What I want to do is build a circuit and try to have two ADC inputs (half gas and half brake) on one pot, because I want to play motorcycle games on real hardware with a flight yoke (ala the Star Wars one), as a similar game Paperboy used a single Y-axis input for accel and brake IIRC. Most bike games have two separate inputs for accel and brake. I do not care about the minimum or maximum value of the pot, because my games Harley Davidson, Wild Riders Naomi 2 cart, Model 2A Manx TT & Motor Raid all have calibration.

I am aware this will not work well for Daytona USA series and Scud Race because they have a 'rocket start' technique that requires you to hold both the brake and gas down for a faster start.

Just want to know if anyone's achieved anything like this...

 

[nem]

I don't see any reason why a dual gang potentiometer wouldn't work.

 

[PaulWoodpross3r]

I don't see any reason why a dual gang potentiometer wouldn't work.

Yeah I heard about dual gang pots. There is that rare case though where a replacement pot for a controller is next to impossible to replace, let alone a dual-gang variant for it.
I've also found this thread where somebody Frankenstein'd a pot with a chip to output two signals; perhaps I could try this at a later date. https://www.instructables.com/Crossfader-Circuit-Point-to-Point/

Additionally I have a motorcycle controller with a Gameport connector on the way - X-Technologies Ducati Corse Handlebar - and from the factory the two pots for brake and gas are wired to the same axis. I tried to crack open a PS2 version of the same controller for modding purposes and it was a complete nightmare so my goal is to play without gutting the controller. My guess is the two pots inside that controller have two of its three lugs shorted together because the Thrustmaster Grand Prix 1 from 1996-97 behaves the exact same way.

Side story: I know you can make a 15-pin Gameport controller with analog pots work on an arcade system if you place a resistor between the 5V and the analog input, then another resistor between the wiper and ground, and it will generate an output for the pot that way, but the values are likely to not match a real 5k pot because they are wired differently from what arcade boards want. I might have to experiment with it some more. I experimented that using a breadboard and by following this: http://www.built-to-spec.com/blog/2009/09/10/using-a-pc-joystick-with-the-arduino/ and running Dupont pins to the Model 3 filter board