[Coco] MC-10 Power Supply

[Kevin Becker]

My local Guitar Center has a 9V AC power supply in stock and I was going to
try to pick it up after work but I didn't have time.

I did, however, take a look at the MC-10 schematic in the service manual
and it looked to me that that with the rectifier circuit a DC power supply
would actually work (mostly) fine.  The service manual states the negative
voltage is only used for the RS-232 port.  So I took a minor gamble when I
got home and, sure enough, it boots up just fine on DC.  I'm not going to
mess with the RS-232 port until I get a proper power supply but for general
usage I think the DC adapter is fine.

On Wed, Apr 11, 2018 at 3:45 PM, rietveld rietveld <rietveldh at hotmail.com>
wrote:

> I use an old Nintendo power supply. It's been working fine for along time
> now
>
> Sent from my BlackBerry Passport Red Edition.
>   Original Message
> From: Kevin Becker
> Sent: Wednesday, April 11, 2018 12:48 PM
> To: CoCoList for Color Computer Enthusiasts
> Reply To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] MC-10 Power Supply
>
>
> It didn't seem plausible to me that a DC supply would work either but that
> was a claim I found in a forum.  I was hoping to avoid buying a power
> supply for this little guy but I guess I may need to.  I am going to go
> sift through a big junk box we have in the basement here at work though.
> Maybe I'll get lucky.
>
>
>
> On Wed, Apr 11, 2018 at 12:27 PM, Simon Jonassen <simon at roust-it.dk>
> wrote:
>
> > A SNES power supply works....
> >
> > needs to be AC out - 9v doesn't really matter, nor does 12v as theres an
> > internal regulator (7805) + smoothing cap and bridge rectifier.
> >
> > /Simon :)
> >
> >
> > -----Oprindelig meddelelse-----
> > Fra: Coco [mailto:coco-bounces at maltedmedia.com] På vegne af Kevin Becker
> > Sendt: 11. april 2018 18:22
> > Til: CoCoList for Color Computer Enthusiasts
> > Emne: [Coco] MC-10 Power Supply
> >
> > I just picked up a pretty rough looking MC-10 from craigslist.  It came
> > with the RAM expansion pack, a cassette cable, and the video cable, but
> > sadly it is missing the power supply.  I've done a little googling and
> > found some hints that a 9V DC power supply would work even though it
> > requires 8V AC.
> >
> > Does anyone have any experience with this?
> >
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