Sega Rev. B JVS - power input questions

[gique]

Hi, I am doing a little software R&D on controller I/O.

I am wondering if I can power a JVS without resorting to an arcade power supply so I can make a compact, low power desktop setup for my experiments without using my arcade cabinet.

I`m not using jamma boards at all - the set up would be like this.

PC -> JVSPAC-> JVS -> JAMMA-> REWIRED CONSOLE JOYSTICK

The only thing needing external power in this setup, after the PC of course, would be the JVS, so I am assuming I could wire up a mains adaptor to the JVS via the jamma harness or CN7 or CN6, but am unsure of how I can supply power to the device safely and compactly.

Would a mains adaptor of some sort be ok? or even USB 5V?

I am NOT using any PCB's in this setup, just the JVS in isolation.



Thanks!

[cools]

Typically you'd supply power to the JAMMA, and the JVS pulls from there.

Really depends what JAMMA2JVS board you are using.

[gique]

Typically you'd supply power to the JAMMA, and the JVS pulls from there.

Really depends what JAMMA2JVS board you are using.

I'm using this one, it has the additional +5 +5 +12 +12 G G connector at the top left.

https://assemblergames.com/attachments/ ... -jpg.8961/

[cools]

I'd just use a regular old JAMMA PSU for the +5v and +12v in that case.

[gique]

I'd just use a regular old JAMMA PSU for the +5v and +12v in that case.

Does the JVS require both 5 and 12v just to power that unit alone? As I mentioned, I am trying to find a more compact and hopefully cheaper solution.

looking at this table, it seems it draws a tiny amount of power.

https://wiki.arcadeotaku.com/w/PCB_Power_Consumption

[cools]

Sorry - I've finally wrapped my head around what you're trying to do (control a Console from a PC via JVS?)

Why not just extend some wires from the PC power supply? That'll have 5v and 12v and oodles of both.

[gique]

Sorry - I've finally wrapped my head around what you're trying to do (control a Console from a PC via JVS?)

Why not just extend some wires from the PC power supply? That'll have 5v and 12v and oodles of both.

No, I just want to test JVS controller input and output from my PC. Extending wires from my PC isn't portable or compact.

this is all I am trying to do, while keeping the whole thing compact

quick scribble diagram
https://imgur.com/a/lcwg0L9

[cools]

Ahh, you're pixelcorps from shmups. Hi!

Not sure you're going to get much of a solid answer from anyone, seems like a unique case. If it were me I'd make an extension cable from the PC as a cheap trial to establish power requirements, then go from there deciding whether a second PSU is needed or not.

As an alternative you could mask off the 12V on the JAMMA side of the IO and try it with your cab as a test. You'll need some way of measuring the current drawn on the 5V as well - wouldn't want to just hack up a USB cable only to find it's pulling decent amps and you've blown your PC USB ports.

[gique]

Ahh, you're pixelcorps from shmups. Hi!

Not sure you're going to get much of a solid answer from anyone, seems like a unique case.

Hi! Busted already?? hahaha

Ok, so if I use a seperate arcade power supply, is the Meanwell Q120D OK?

Input
100∨～120∨ / 200∨～240∨

Out
＋５∨-----８A-----variable
＋１２∨---２A
＋２４∨---２A
－１２∨---１A

its my cheapest option without resorting to suspect chinese junk..

[nem]

What's the end purpose for this?

"JVSPAC-> JVS -> JAMMA-> REWIRED CONSOLE JOYSTICK" seems super redundant.

I'm pretty sure you can power a Sega JVS-JAMMA IO with just 5V, so you could just pick up whatever small 5V PSU you can find. The power draw is negligible. I use a 5 euro 3A PSU for a Sega Type 1 JVS IO.

[cools]

What's the end purpose for this?

"JVSPAC-> JVS -> JAMMA-> REWIRED CONSOLE JOYSTICK" seems super redundant.

Took me a while too. JAMMA + REWIRED CONSOLE JOYSTICK = Cab controls without the cab.

[nem]

But why is there a jamma connection at all?

[cools]

I'm assuming the console stick is already customised to JAMMA, and the JVS JAMMA is already bought - otherwise yeah you'd just wire it to a JVS IO

[gique]

But why is there a jamma connection at all?

I think I have mentioned a few times previously it`s for research and development regarding JAMMA / JVS IO

Thanks for the info on the 5v power supply. glad to hear someone else has done it.

I tried a USB cable from a soon to be junked laptop, and got a power surge warning, however this same laptop can`t handle external USB drives either.

So I tried it on my desktop and got the power on "click" from the JVS and no power surge warning. I`ll try the 5v adapter next.

[invzim]

You don't need to power it via jamma

For bench use, I have this one:
https://wiki.arcadeotaku.com/w/JVS#Sega_838-13683-02
https://wiki.arcadeotaku.com/images/c/c ... 02-pcb.jpg

and have simply soldered a couple of loops where 'CN9" was supposed to go, https://www.digikey.no/product-detail/e ... -ND/278888.
That way I can hook up to my lap PSU with clips, or even use a USB charger as supply as it draws close to no power.

[gique]

You don't need to power it via jamma

For bench use, I have this one:
https://wiki.arcadeotaku.com/w/JVS#Sega_838-13683-02
https://wiki.arcadeotaku.com/images/c/c ... 02-pcb.jpg

and have simply soldered a couple of loops where 'CN9" was supposed to go, https://www.digikey.no/product-detail/e ... -ND/278888.
That way I can hook up to my lap PSU with clips, or even use a USB charger as supply as it draws close to no power.

when you say USB charger you mean something like this?
https://cdn.sparkfun.com//assets/parts/ ... 56-02a.jpg

this is 1A, is that enough?

[invzim]

Yes, or just power it from your computer..

IMG_1059.JPG