Build Your Own Arcade Controls Forum

Arcade Collecting => Miscellaneous Arcade Talk => Topic started by: kenzo42 on April 04, 2005, 02:22:01 am

Title: jamma pcb voltage and current
Post by: kenzo42 on April 04, 2005, 02:22:01 am

hi, i was wondering if anyone knows how much current/voltage a jamma board draws? i'm sure it's variable from game to game, but how about an avg. approximation?

i couldn't find this in any game manuals.

thanks.

Title: Re: jamma pcb voltage and current
Post by: paigeoliver on April 04, 2005, 03:00:47 am

They all use the same switching power supplies, that provide +5, +12 and -5 volts. The switchers run on 120 volts AC like everything else in your house.

I have a feeling that isn't what you are looking for, so it might be better if you tell us what you are looking to DO with said information.

Title: Re: jamma pcb voltage and current
Post by: kenzo42 on April 04, 2005, 03:23:00 am

i need to run a load on my psu since my monitor is jacked through it. ken layton aleady gave me some advice on the resistors i should use. i was just curious on how close those load resistors would come to the pcb load.

Title: Re: jamma pcb voltage and current
Post by: gearguy on April 04, 2005, 03:35:33 am

Well what make of PSU are you using anyway?
While the voltage remains the same - some of them have (slight) Amp rating differences.

Title: Re: jamma pcb voltage and current
Post by: kenzo42 on April 04, 2005, 04:00:45 am

make is JQA. here's a couple pics:
http://pg.photos.yahoo.com/ph/liu_feng_yi/detail?.dir=cb97&.dnm=46eb.jpg&.src=ph
http://pg.photos.yahoo.com/ph/liu_feng_yi/album?.dir=48ad&.src=ph&store=&prodid=&.done=http%3a//photos.yahoo.com/ph//my_photos

5v / 7a
12v / 1.5a
-5 / .1a

Title: Re: jamma pcb voltage and current
Post by: paigeoliver on April 04, 2005, 04:19:12 am

Quote from: kenzo42 on April 04, 2005, 03:23:00 am

i need to run a load on my psu since my monitor is jacked through it. ken layton aleady gave me some advice on the resistors i should use. i was just curious on how close those load resistors would come to the pcb load.

Pcbs vary wildly, you will use the same power supply for a teeny tiny 5" square board as you will for a gigantor stack of 3 boards that are each like 16"x24".

Title: Re: jamma pcb voltage and current
Post by: Ken Layton on April 04, 2005, 10:30:29 am

The resistor values I specified will load the power supply to a 5 ampere load.