SpritesMind.Net

Hi guys;

I recently bought a SEGA-brand Wondermega. It came without any AC adapter. The only info I could find on the system itself is that it's needing 9,5V but what's with ampere ?

I've been digging through the web and found quite a few people with very different, contradicting opinions on what's recommend. I've read that it would work with a Genesis 2 AC adapter (10V / 0,8A) but I am sure that the guy had an X'EYE (or maybe the Japanese Wondermega Model 2) in mind. Others claimed that it would need 1,2 - 1,5A. As you can imagine I am pretty confused and I don't want to damage the system by randomly trying out some AC adapters.

Does anyone actually know the exact values that I should look for when buying a multi AC adapter ?

Thanks in advance,

-Chris

General law of electricity: You can't have too many amps.

In other words, you can have a powerbrick with 200 amps, and the system would only take what it needs.

What are important to prevent frying the system, is voltage, and polarity. (and polarity is VERY important!)

Are you sure ?


Hm, wait a second - aren't you the guy with the Sonic 2 NES hoax ?!

Ask any electrician, they will tell you. Voltage and polarity is your danger!

For example, USB gives you 500mA to work with. Each device only takes what it needs. Like, a USB sound device may only need 200mA, it takes just that, so you have 300mA available left, and that can be left unused.

Bringing up my past life of hoaxing was uncalled for, and insulting (because it's a year ago, and I'm STILL trying to get my name back!). I'd never tell you something that would obviously danger your console.

it's true, but there is probably a power rating expressed in Watts (W)

Power = Voltage*current (in DC current), if you have the voltage input and the power rating, you can calculate the maximum current that the wondermeg draws... I'm sure it's not more than 2A...

Thanks but I don't have any information except that it needs 9,5V (and the polarity).


- What would happen if I provide not enough Ampere ? Nothing ? - I really don't want to damage the unit.

evildragon wrote:Bringing up my past life of hoaxing was uncalled for, and insulting (because it's a year ago, and I'm STILL trying to get my name back!).

Well, I basically just wondered why someone like you is tolerated around here... - I guess for me it's actually kinda dissapointing to see you posting here.

evildragon wrote:I'd never tell you something that would obviously danger your console.

That's good to know but there wasn't any direct connection between these two remarks.

Giving it not enough Amps will usually just result in odd buzzing sounds, streaky video picture, but won't hurt it as far as I know, just odd behavior.

(Edited because I don't want an argument)

ED is right, thing takes as many amps as it needs.

since everything has 7805 inside, you can use a brick with 8 to 18V and probably 1...2Amps are enough.

@Christuserloeser please post here some nice pics of Wondermega

On a completion note, the AC adapter will provide X amps to suply the needs of the apliance connected to.

You may want to provide more amps then less, the reason is that if you provide less amps usualy your AC adapter will overheat, if it is in a plastic case there are chance of melting... etc.

European SEGA AC bricks can output up to 4A... but they get pretty hot then (but plastic won't get soft)...

Thanks a lot for your answers, guys. I will try and see if I can get it to work - I got the odd feeling my unit is broken.

So far I tested it only with a SMD model 2 AC adapter which doesn't provide enough ampere... 850mA if I remember correctly but I need at least 1500 - 2000.,

Anyway, If I understand you guys correctly it should at least have powered on...

I've been told I could use parts of the North-American CDX to fix it. Anyone got any experience with that ?

tinctu wrote:@Christuserloeser please post here some nice pics of Wondermega

Alright, you can expect a few pics in January

- until then you can see some nice pictures of the unit here:
http://www.segagagadomain.com/hardware-mega/wonder1.htm
http://www.uk.playright.dk/raretitel.php?id=14481
http://www.sega-universe.de/?article=48 ... Wondermega

Early SEGA MD AC-DC adaptors was true 10V/1,2A. That is mean, when we load it by 1,2A, it give us at least 10V. But when it not loaded, it can give 17V-20V (17 typically). If you have an 16V capacitor at input - it can be blow. Now, SEGA MD gets all-in-one chips and console needs approximate 10V/0,8A (or even less Amps). And now SEGA MD AC-DC adaptors is more weakness, than was before.