I have some racing games that are Jamma + connector for analog input.
As these are games played on MAME are perfectly playable using the keyboard, I realized that converting the analog controls to fighting sticks and buttons would be interesting, thus being able to play these games on any cabinet made for fighting games.
So I created these two small circuits that feed the steering wheel, accelerator and brake input.
One circuit simulates the steering wheel and another the accelerator and also the brake, you have to do one for each.
All circuit resistances were calculated to correctly simulate the real limits of an analog accelerator, brake and steering wheel.
The accelerator or brake circuit emits 0.4v when at rest and emits 4.6v when pressed.
The steering wheel circuit emits 2.5v in the center, 0.4v to one side and 4.6v to the other, the centering is adjusted on the circuit's 10k potentiometer.
I've already played Suzuka 8 hours 2 and Fourtrax on my standard fighting game cabinet and it works perfectly, you just need to connect the circuits to the microswitches on the stick and buttons you're going to use.
The circuit can be powered directly from the 5V arcade power supply or can use the power supplied by the game board connector.
As these are games played on MAME are perfectly playable using the keyboard, I realized that converting the analog controls to fighting sticks and buttons would be interesting, thus being able to play these games on any cabinet made for fighting games.
So I created these two small circuits that feed the steering wheel, accelerator and brake input.
One circuit simulates the steering wheel and another the accelerator and also the brake, you have to do one for each.
All circuit resistances were calculated to correctly simulate the real limits of an analog accelerator, brake and steering wheel.
The accelerator or brake circuit emits 0.4v when at rest and emits 4.6v when pressed.
The steering wheel circuit emits 2.5v in the center, 0.4v to one side and 4.6v to the other, the centering is adjusted on the circuit's 10k potentiometer.
I've already played Suzuka 8 hours 2 and Fourtrax on my standard fighting game cabinet and it works perfectly, you just need to connect the circuits to the microswitches on the stick and buttons you're going to use.
The circuit can be powered directly from the 5V arcade power supply or can use the power supplied by the game board connector.