As I said to you bud, makes me wish I still had a pure JVS cab so I could have a play with it
Since I'm nerding out tonight, I did some tests to verify voltage drop. Not the end-all super scientific test, but I think good enough.
I soldered on some test pins on a PCB to simulate a game, and loaded it with 5 amps on my fancy electronic load - this is as much as you're ever likely to encounter I think. wiki.arcadeotaku.com/w/PCB_Power_Consumption
The higher the amp, the more voltage drop you will have given other things being equal.
Here is the measurements on the input of the Jammafier:
And here I switched the probes to the 'game':
Some rounding and not taking absolute accuracy of the meter into account:
Reading at Jammafier power entry: 4.96V
Reading at game: 4.91V
Voltage drop: 0.05V when loaded at 5A.
Ran the same test setup with the Namco one and it voltage drop was 0.23V - I was expecting it to be a bit higher.
The production run of the Jammafier will use a jamma edge connector from a different manufacturer - but I don't expect numbers to change much or if at all.
For final test, and the one that is probably more relevant to 'normal scenarios' - I tested the Jammafier with 1.5A load:
Reading at Jammafier power entry: 5.2914V
Reading at game: 5.2880V
Voltage drop: 0.0034V when loaded at 1.5A. This is so low that the accuracy of meter and probes probably come into play.
Executive summary: it werks well :)
No question who the king of cool stuff is ( @FrancoB ) - acrylic top covers fit perfectly!
Had a little noise issue with the -5V dc-dc conversion, which is fixed in next revision that will arrive next week. It's just a really minor reivison, so unless some oddness occurs this is pretty much how the final units will be shipped.
Nice one bud! Looking good
You supplied me with a nice precise model of your board so it was easy to design something for it
@FrancoB is da man, love his works!
@invzim Cant wait to get my hands on one of these to test it out.
If I use splitters on the audio/video and power lines to plug in a JVS board, can the jammafier be turned off without unplugging power to it? Just to make it easier to switch back and forth without unplugging everything all the time.Multis: CPS1│CPS2│CPS3│ST-V│F3│GNET│TTX2│NAOMI│MVS
Superguns: Jasen's MK30ADCAP│RGB's HASv3.1
Displays: PVM 2950Q│Pioneer PDP-V402E│LG B6 65" Oled
Scalers/Misc: OSSC│VP50Pro│Gscartsw │Hydra
This exactly what I was hoping to find for my Naomi Deluxe cabinet. Is there any ETA or rough price this will be when its ready? I'm definitely interested