Gold Wings
Gottlieb, 1986
Hollywood Heat
Gottlieb, 1986Hi,
I'm looking to rebuild 2 sys80b games and am considering using switched PSUs for 5v logic voltage, +-12V sound and 5v for controlled and GI lamps.
I know the GI is originally 6.3V AC, but to simplify matters I would like to use cheap switched PSUs for this.
Is there any particular reason the GI and controlled lamps cannot run from the same 5v DC supply - would 2 separate supplies be necessary ?
I know the coils will need power from a ordinary transformer.
Quoted from Zigzagzag:Hi,
I'm looking to rebuild 2 sys80b games and am considering using switched PSUs for 5v logic voltage, +-12V sound and 5v for controlled and GI lamps.
I know the GI is originally 6.3V AC, but to simplify matters I would like to use cheap switched PSUs for this.
Is there any particular reason the GI and controlled lamps cannot run from the same 5v DC supply - would 2 separate supplies be necessary ?
I know the coils will need power from a ordinary transformer.
This sounds like an all around bad idea? Why use a Switching PSU? It’ll fail much sooner than a properly rebuilt original.
Quoted from Zigzagzag:Well ... what if you don't have an original ?
From the post it sounds like you did. I believe someone remakes these boards.
Quoted from Isochronic_Frost:From the post it sounds like you did. I believe someone remakes these boards.
Well, sorry if I wasn't entirely clear.
The status is I have 2 playfields, that's it.
I have built the MPU, driver and displays from lisy.dev - so far so good.
But obviously this is not enough to make a game, so I have to build 2 cabinets, get some translites etc.
Last but not least - the PSUs - by which I mean the whole transformer and regulator setup.
I guess you misunderstood and thought I was talking about the PSU boards, but that is now what I am asking about.
So back to my original question :
Is there any particular reason the GI and controlled lamps cannot run from the same 5v DC supply - would 2 separate supplies be necessary ?
You could just try and see. One issue that I have heard is that the amperage spikes from the flippers can be hard for computer PSUs to handle as it detects it as an "overcurrent" fault. So, I think you'd need to identify one that can handle that case.
Quoted from lolz0r:You could just try and see. One issue that I have heard is that the amperage spikes from the flippers can be hard for computer PSUs to handle as it detects it as an "overcurrent" fault. So, I think you'd need to identify one that can handle that case.
Yep, that is the issue with coil power supply - so I don't plan on replacing that with a switched PSU, just a plain old transformer for that.
I only plan to use a switched power supply for the logic and lamps.
I will give it a try once I have the rest of the game(s) assembled.
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Stavanger
Seattle, WA