UK Console power supply's on a PCE Duo

[TheOldMan]

I don't own an Everdrive,

Rats.

this is about total current draw of the console

Got it. Just wondering if ED causes extra draw on power supply. (Not just bus)
If you were seeing 900mA draw, for example, that might be enough difference for border-line supplies to flake out.

there had already been measurements made by db electronics on the current draw of everdrives, so there's no need for me to repeat that.

Verification is always nice. ( consider the source )

[ClodBuster]

Db electronics is way more capable in measuring the bus than I am. I don't even have an oscilloscope yet. I have no reason to doubt him.

I do not worry about the power supply itself with flashcarts.

What I'm just doing is figuring out what kind of safety margin is reasonable when choosing a Turbo Duo power supply on your own. To avoid malfunction of the console and overloading the supply.

[ClodBuster]

(Pic source: konsolenkost.de)

Hah! I just found an original PAL Sega Mega Drive power supply model no. 1602-18 (for 220 V / 50 Hz regions) among my spares.
10 V DC
1.2 A

Along with an adaptor for the Turbo Duo power inlet, this should do the trick.

EDIT: Well, this power supply is a bit like Schroedinger's cat. It does and it doesn't.
Why? Because it has a reversed polarity on the plug: Positive voltage on the outer ring and ground being on the tip.

Do not use it.

Unless you have another adaptor handy that reverses the polarity to positive tip and outer ring ground. I did built such an adaptor by myself, since I had the parts available among my spares anyway.

[Winniez]

I wonder if there are any PSUs with multiple outputs. It would be handy to have a single unit with 4 plugs hooked to Famicom, SFC, MD and PC-Engine. All systems use the same plug and the power ratings are similar too.
 In theory even a simple adapter could do the trick since only one system would draw power at a time.

[Gypsy]

I wonder if there are any PSUs with multiple outputs. It would be handy to have a single unit with 4 plugs hooked to Famicom, SFC, MD and PC-Engine. All systems use the same plug and the power ratings are similar too.
 In theory even a simple adapter could do the trick since only one system would draw power at a time.

https://www.sweetwater.com/store/detail/1SpotMC5--truetone-1-spot-multi-plug-5-cable

[ClodBuster]

I just wrote an addendum to that Mega Drive PSU to my post further above.

About those multi plug cables, well.... I wouldn't use them. Even if you've got your console switched off, there's still voltage present inside the case up to the fuse and the power switch. Hooking several consoles to the same single PSU is asking for trouble.

If I would need to save sockets on a multiple socket outlet, I'd rather use one single universal switching power supply with a good safety margin on wattage rating. And then only connect one console at a time with an adaptor plug of the correct voltage and polarity.

[Gypsy]

I just wrote an addendum to that Mega Drive PSU to my post further above.

About those multi plug cables, well.... I wouldn't use them. Even if you've got your console switched off, there's still voltage present inside the case up to the fuse and the power switch. Hooking several consoles to the same single PSU is asking for trouble.

If I would need to save sockets on a multiple socket outlet, I'd rather use one single universal switching power supply with a good safety margin on wattage rating. And then only connect one console at a time with an adaptor plug of the correct voltage and polarity.

Yeah I wouldn't use one of those myself for lots of reasons but since someone asked, I figured I would link. I should have posted some text to go with it.

[ClodBuster]

No worries.


I just tried out that Sega 1602-18 power supply, along with a polarity reverse plug adaptor, with my Turbo Duo.

At no load, it supplies around 14 V. So I guess this could be an unregulated power supply.
With my Duo as a load, there's still 11 V measured on the fuse, when I switch the console on.
Still, all readings in the console after the voltage regulators are fine.

The voltage regulators are getting hotter to touch than when I use my lab power supply set at regulated 10 V. The 7805 voltage regulators will accept input voltages from 7 V to 25 V DC. So I guess there's more power to dissipate into heat with higher input voltages, since - another guess -  their efficiency drops with higher input voltages.

If somebody more tech-savy could tell me if my assumptions are right or wrong, please let us know.

EDIT: I'll measure the current draw tonight.

[Winniez]

Yeah, kind of figured that it might not be a good idea. Thanks for confirming.
And I'm "Way Out Running!" Clodbuster

[ClodBuster]

"Anytime Baby!"

Whoops, I forgot about the measuring. Will do so tonight.
In the meantime, I recovered that good ol' switching supply from one of the boxes I used for moving a year ago. I'll also do measurements on this for the sake of comparison.

[penrhos]

I've been using these 9VDC @ 2.4A UK PSU's for any PCE imports I've got, you just need to swap the DC plug on the end to the correct size/polarity. Off-load they output 9.1-9.2VDC.

I can confirm they work fine with IFU-30's, Shuttles, Core-II's, Duo-r's & Duo's. the extra Amps means the voltage doesn't drop on heavy load.

https://www.ebay.co.uk/itm/Switching-Power-Supply-AC-Adapter-HKP24-0902600dB-Input-100-240V-Output-9V-NEW/291549901064?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649