A little while ago I undertook the process of scratch building my own PC racing sim. It's all done now but one thing that i'd like to share with you all is how i accomplished a load sensitive brake pedal.
See, in a real car, the pedal does not really move all that much, even less in a race car. The braking force is then proportional to the force applied to the pedal and not the MOVEMENT. The problem lies in that most commercial pedal/wheel setups simply use a spring under the pedal and it detects movement of the pedal, but it just doesn't feel real.
Now, i don't claim to be the pioneer of this load cell idea but i would like to share the interface that i have made to enable one to be used. There is at least one commercial LC interface available by itself or built into a USB joystick board but it seems they have effectively stopped selling them. Hence, they are effectively unobtainable.