General questions on wheel+pedal building

[metallo97]

Hi all, i'm going to build a FFB steering wheel+pedals+shifter and i've got some questions i think you can reply...

So i think i will be using the MJoy16 AVR controller for the wheel, pedals and shifter. The shifter is very simple to do. Two of the three pedals would come from a crappy steering wheel, but i need to do another one...
The most difficult part is creating the steering wheel. I'm gonna use a wiper motor for the force feedback. And now begin the questions...
How do i make a simple potentiometer turn 900°+? Do i have to create some gears?
Then which is the simplest h-bridge? I have an arduino, i think i can simply attach an h-bridge shield and an external power supply and then the signal would come from the software...
Thanks all for the help!

[vicpopo]

Look here : http://www.x-sim.de/forum/viewtopic.php?f=40&t=1430

And here: http://www.x-sim.de/forum/viewtopic.php?f=40&t=1090

[RacingMat]

Hello metallo!
You're aiming an ambitious goal! Great!
Among the many points you listed, you will have to drive the torque, not the speed : hence Hbridge won't work! You need more elaborate drive.
Mat

[metallo97]

Thanks man! I had already seen that, so do you think it's better to go with the AS5045 for the steering wheel?
Better one or two motors? I will use a wiper motor and i think it will gave me lots of torque...

And at last, i want this to be cheap, so nothings very professional...

[RacingMat]

There are many multiturn pot! but quite expensive (~30€) or you can use gears to reduce the range (but you will reduce precision as well).
Prefer cermet track.
Choose linear (non log) 10k pot.

[metallo97]

Definitely the pot way it's the cheapest... I think I will search for multi turn one but they're like 10 turns which are very much for a steering wheel!

Inviato dal mio Nexus 5 utilizzando Tapatalk

[metallo97]

Maybe the best thing is to place a magnet on the shaft of the motor and the magnet sensor directly in front of him...

Inviato dal mio Nexus 5 utilizzando Tapatalk

[RacingMat]

But you will only get 360•

[metallo97]

Are you sure? I think that with the help of a microcontroller like an arduino, if you reach 360 degrees and it suddendly goes to 0 degrees he would think that it's another turn on the same direction... This would be even easy to program... So i would even need an arduino to control... So, instead of creating a new FFB board i can use the arduino for sending/receiving FFB commands and to send controls for the wheel axis to the MJoy...

[RacingMat]

It would be easy to program if all the values were consecutives... Your arduino will not see all the values due to refresh and calculation rates!
But it's probably doable...