Power Adaptors / Famicom Power Supply

[a.l.e.x00]

I live in a 120V area, I believe, in New Westminster, British Columbia, Canada.

[MaxXimus]

I always thought we were 100v haha. Oh well, but yes.

[133MHz]

Japan is the only 100V country in the world. Others vary between 110 and 127V.

[nurd]

I just bought a sharp twin famicom on ebay without a power cord, and I emailed Pink Godzilla and asked if the universal(ish) one they sold would work with it, they said it wouldn't.

I'm new to this, so I don't really know what to do.

[133MHz]

You need one with a 9V DC output, 850mA minimum and negative center.   ( + )--->C<---( - )

Careful! Reverse polarity will make your Twin go BANG!

[kite200]

The famicom AC and disk system AC are not the same, the differences are in bold:

famicom:

AC-Adaptor
MODEL HVC-002
AC100V 50/60Hz 18VA
DC10V 850mA
+ ------ C------- -



disk system:

AC Adaptor
MODEL HVC-025
AC100V (50/60Hz)
9VA
DC9V 400mA
+ ------ C------- -

[133MHz]

The difference is so small it's not going to hurt anybody. Maybe the current rating of the FDS adapter is a little low but in practical purposes you won't notice it at all.

[kite200]

thanks for clarifying but im not going to find out

[133MHz]

Will...

* Too low a voltage rating hurt my Famicom? - No, it may work erratically or not at all, but no damage.
* Too high a voltage rating hurt my Famicom? - Only if it's something ridiculous, 12V tops.
* Too low a current rating hurt my Famicom? - No, it may work erratically or not at all, but no damage.
* Too high a current rating hurt my Famicom? - No, a higher current rating is better, the transformer will run cooler and the Famicom just takes what it needs
* Reverse polarity hurts my Famicom? - YES! I know AV Famicoms have reverse polarity protection, and thanks to 2A03 that Twin Famicoms do not! So better don't try it, you may blow capacitors and regulators, and possibly other things.
* NES adapters hurt my Famicom? - YES! They're AC and the Famicom requires DC, you may blow capacitors and regulators and possibly other things.





Disclaimer: No Famicoms were harmed in the realization of these experiments, just Famiclones

[Har the cat]

wow.. good to know    thanks, i didnt knew that

[nurd]

So, i need a " 9V DC output, 850mA minimum and negative center."

If i find a "9V DC output 850mA minimum" with a positive center, can I just switch the pins on the plug to switch the polarity?

I've never done anything like this.

[133MHz]

So, i need a " 9V DC output, 850mA minimum and negative center."
switch the pins on the plug

What do you mean by that? Also, it doesn't have to be exact 850mA, it can be more and it will be fine.

[nurd]

Sorry, I don't really know what I was thinking.

I found something.
The output is 12VDC 1200mA.

The other post said 12V tops, and I dont want to hurt it.

[battra92]

thanks for clarifying but im not going to find out

I just bought a FDS without a power adaptor (though they claim it's working) and I plan on getting some NiMH C cells. One less cord anyway.

[133MHz]

It could work if the polarity is the correct one, but a 9V one would be best. It will still work, it will just get a little hotter. (The 7805 regulator inside takes the variable 9V from the transformer and gives a steady 5V output, the other 4V are dissipated as heat, so with 12V you still get your nice 5V output, but now you're dissipating more heat (7V)).