Re: c64 / vic 20 power supply replacement

From: Hegedűs István <>
Date: Fri, 28 Oct 2016 10:05:03 +0200
Message-ID: <>

I have modified my round connector Plus4 power supply. I have thrown out the 
PCB inside and only kept the transformer. Then I designed a new PCB which 
has rectifier and a DC-DC bucket converter for the 5v part (LM2596-5).
Like this one

It works fine and fits the original power supply however I had to change the 
LM2596 to a fixed voltage version because I have noticed that even if I set 
the output voltage with potmeters, with time it slowly changes voltage. I 
wanted stable 5 volts.


-----Original Message----- 
From: Didier Derny
Sent: Friday, October 28, 2016 9:37 AM
Subject: c64 / vic 20 power supply replacement


Is there any existing replacement for c64 power supply ?
I have 2, one with round connector for c64 / vic 2 and one with square
connector for plus4
both are heating like hell, in no time and have a really bad smell...

I found one replacement on ebay but apparently not working in europe...
I tried to contact the vendor but no answer...
I found some people using 2 power supply  5v from usb  and 9v ac from an
external 9v ac power supply

any way to produce the 9vac from  DC ?
there is the problem of galvanic isolation...


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Received on 2016-10-28 09:00:02

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