Main > Main Forum

Mini-PAC to spinner wiring problem FIXED!

<< < (3/4) > >>

Kremmit:

--- Quote from: Paladin on March 27, 2007, 11:44:16 am ---I checked online for the Atari optic pinout before wiring it up.  I didn't just trust that the Ultimarc diagram matched my optic board.  My wires are hooked up like the optic board pictured below.  I haven't tried swapping the power and ground, as I'm pretty sure the photo shows the correct position.
 

--- End quote ---

I think you and I are reading Tex's comments differently.  I understood him to be saying that the +5 and Ground were reversed on the Ultimarc side, not the Atari side.  But maybe I'm wrong.  :dunno

Kremmit:
OK, I got off my butt and hooked up a duplicate optic board here, it is working fine on an Opti-Wiz.  I can confirm your pin assignments on the optic board.  I don't have a Mini-Pac to test with, at least not yet.  Ordered one yesterday, though.

Paladin:
Thanks for the help guys!  I'll be out of town for a week, so I won't be able to mess with it for a while.

BobA, I wasn't getting any voltage differences without the resistors - just a solid 5v.  Once I put the resistors on I did get a swing when moving the encoder wheel.  I think it was a high of 2.5v and a low of about .7v, but I don't have time to check it before I leave.  I have no idea why I'm getting 4 flashes of the LED with the resistors and none without.  I've only got 1sw1 1sw2 and the spinner hooked up, 4 flashes looks like player 2 joystick right on the Ultimarc error code list. 

Could the voltage still be too high?  Maybe if I try 1.5k resistors to pull the signal down even further.

Oh well, I'm going to try and forget about it while I'm on vacation.

RandyT:

--- Quote from: Paladin on March 28, 2007, 04:58:57 am ---I think it was a high of 2.5v and a low of about .7v ....<snip>

Could the voltage still be too high?  Maybe if I try 1.5k resistors to pull the signal down even further.

--- End quote ---

I've never used the hardware in question, but from a basic digital electronics standpoint, your high doesn't sound high enough.   Also, going from a 1k to 1.5k resistor between the signal and ground won't pull the signal down more.  It will increase the amount of resistance and allow the signal to remain at a higher level.

That being said, it sounds like you are heading in the direction you need.  Check with Andy to see what components are recommended, but I would try a 10k and work my way lower until it is stable and working.

RandyT

BobA:
Have a good holiday.  I sure it will get sorted out when you get back.
 :cheers:

Navigation

[0] Message Index

[#] Next page

[*] Previous page

Go to full version