The NEW Build Your Own Arcade Controls

Main => Main Forum => Topic started by: chrimeg on February 17, 2008, 10:24:00 am

Title: Dual arcade steering wheel help.
Post by: chrimeg on February 17, 2008, 10:24:00 am

Hi,

I managed to purchase a used dual steering component for $20.00. Both wheels are 360 degree optics & not pot controlled. Problem is I don't know how to hook it to my opti-pac.

I've attached a few images of the component to see if anyone can help.

What game did it come out of? What wires go where on the opti-pack?

Thx

Title: Re: Dual arcade steering wheel help.
Post by: chrimeg on February 17, 2008, 10:27:50 am

Just a few more pics for detail just in case....

Title: Re: Dual arcade steering wheel help.
Post by: chrimeg on February 17, 2008, 10:41:06 am

I've listed the pins that are currently used and and the wire colors going to them.

The white and red wires look like 16 gauge while the brown and grey are much thinner.

The IC controller ont the board is a 74LS14 PC. Currently trying to find schematics for this IC to see if I can trace the connections.

Title: Re: Dual arcade steering wheel help.
Post by: fa001 on February 17, 2008, 11:08:20 am

Did you look at the optipac's web site? http://www.ultimarc.com/optipac3.html
Each wheel could be wired as one axis of a trackball. Then one would set up mame to determine which is which player.

- Fred

Title: Re: Dual arcade steering wheel help.
Post by: chrimeg on February 17, 2008, 11:24:09 am

Yeah I've been looking at that. Just can't determine which connections feed where off my PCB spinner board. Not sure which is ground, which is hot etc.

Title: Re: Dual arcade steering wheel help.
Post by: fa001 on February 17, 2008, 11:40:56 am

Not knowing which game your wheel is from I can not find the specific schematic. However here is a typical encoder. I would suspect that yours would be similar.

(http://i228.photobucket.com/albums/ee141/fa001/steering.jpg)

Title: Re: Dual arcade steering wheel help.
Post by: fa001 on February 17, 2008, 11:47:27 am

Also on the IC pin 14 should be the +5 volts and pin 7 the Gnd. So you can check which wire out is +5 or Gnd by checking continuity to those pins.

Title: Re: Dual arcade steering wheel help.
Post by: chrimeg on February 17, 2008, 11:55:14 am

Thanks that should help. Have to do some tracing to the IC I guess.

That PCB schematic looks very close to what I have.

So if Im correct the 5+ on the opti pac goes to red wire, gnd to black, grey to x1 and brown to x2. Is this right?

Really wish I new what game this came from.....

Title: Re: Dual arcade steering wheel help.
Post by: fa001 on February 17, 2008, 12:28:20 pm

That is where you need to look at the circuit board. But I would suspect that the heaver wires are the power wires and the thinner wires are the signal wires.

So red and white (not black?) are power/ground and grey & brown are signal. But you should verify from the circuit traces which is power and which is ground.

Title: Re: Dual arcade steering wheel help.
Post by: u_rebelscum on February 19, 2008, 03:50:03 pm

The nice thing is with these simple boards, all you need to get correct the first time is the power and ground.  The 2 signal wires can be swapped if you get them backwards (the only problem will be the mouse pointer will move backwards).