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Arcade Collecting => Miscellaneous Arcade Talk => Topic started by: sollyscomputers on March 05, 2019, 12:58:55 pm

Title: Minimum power requirements for JAMMA cards
Post by: sollyscomputers on March 05, 2019, 12:58:55 pm
Hey guys,
I have a 60 in 1 Jamma and looking for a power supply for it.  I found one which says it's for JAMMA cards, here is the link  https://www.ebay.com.au/itm/WM-138-Switching-Power-Supply-Output-5V-9A-12V-1-5A-For-Jamma-Arcade-Pinball/192806914920?hash=item2ce4300b68:g:~i0AAOSwiZVbmI4v (https://www.ebay.com.au/itm/WM-138-Switching-Power-Supply-Output-5V-9A-12V-1-5A-For-Jamma-Arcade-Pinball/192806914920?hash=item2ce4300b68:g:~i0AAOSwiZVbmI4v)

Would 1.5A be enough for the 12V??  What's the minimum required for it to run?

Thanks John
Title: Re: Minimum power requirements for JAMMA cards
Post by: pbj on March 05, 2019, 01:50:49 pm
I use these to power those boards.  No issue.

https://www.ebay.com.au/itm/AC-Adapter-12V-5V-SB-to-IDE-SATA-For-HARD-DISK-Drive-Power-Supply-Black/283018137852 (https://www.ebay.com.au/itm/AC-Adapter-12V-5V-SB-to-IDE-SATA-For-HARD-DISK-Drive-Power-Supply-Black/283018137852)
Title: Re: Minimum power requirements for JAMMA cards
Post by: lilshawn on March 05, 2019, 02:27:13 pm
the 60 in 1 card itself only uses +5 volts. the +12 volts is only used for the built in amplifier circuit. -5 volts is not even used on the cards and can be omitted completely.

if you plan on using external amp for audio via the "headphone jack" you can completely omit the +12 too.
Title: Re: Minimum power requirements for JAMMA cards
Post by: sollyscomputers on March 06, 2019, 01:31:51 am
Quote from: lilshawn on March 05, 2019, 02:27:13 pm
if you plan on using external amp for audio via the "headphone jack" you can completely omit the +12 too.
Interesting.  So you could just use a 5V P/S.  Which brings me to my original question.  How many amps are needed.  I looked at the manual but that doesn't mention minimum req. for power.

PS.  I always use an external amp, but a real small one, just the circuit board type.  Only because I find it very easy to adjust the volume with a pot rather than going through the menu
Title: Re: Minimum power requirements for JAMMA cards
Post by: Malenko on March 06, 2019, 08:46:51 am
The draw on those boards is almost non existent, 1.5A is plenty