Re: plus4 power supply

From: silverdr_at_wfmh.org.pl
Date: Fri, 21 Sep 2012 13:27:40 +0200
Message-Id: <50363892-A2B5-4E0E-9FEF-FB010783D65C@wfmh.org.pl>
On 2012-09-21, at 13:13, Baltissen, GJPAA (Ruud) wrote:

> Hallo Patryk,
> 
> 
>> BTW, Gerrit - what do you think was the point....
> 
> I hope you don't mind me not being Gerrit :)

:-)) Sorry, no I don't mind of course! :-) I somehow thought it was like in private e-mail but of course it wasn't.

> IMO: They wanted to provide +5V and 9VAC anyway. But parts needed to
> provide all the needed current for the +5V became too expensive. So they
> split it up: a part provided by the trafo and one part generated on the
> board self.
> Later boards with the CMOS ICs didn't need that much current and only
> needed the +5V part from the trafo.
> 
> Just my two cents but I'm looking forward for a better explanation.

That's basically what logically comes to mind but was still wondering if there were no other reasons besides potentially cost saving on parts. Actually they had to put in more parts inside the 64 in order to rectify and stabilise the second +5. I don't know what could be the reason though. Some separation due to power noise that could influence the VIC? VIC is provided with this CAN+5 for example..

BTW - what this "CAN" stands for?

-- 
SD!
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Received on 2012-09-21 12:00:30

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