About a year ago I bought a Dragon64 without a PSU. I build an AC PSU myself with 2 transformers providing the 9V and 2*18V AC, but that was too big and unpractical. I know there are modern alternatives for replacing a Dragon PSU, but I wanted to keep everything as much orginal as possible. So I came up with a solution using an C64 PSU.
I am using 9V AC from that C64 PSU and a little adapter cable from DIN to DSUB9 to connect it to the Dragon. This is used to generate the 5V using the orginal Dragon PSU board. The +12V/-12V are generated using a DC-DC Boost Buck Converter with that 5V as input.
I cut the traces from the +12V/-12V near the PCB connector on the PSU PCB and soldered the +12V/-12V from the DC-DC Boost Buck Converter directly on that connector. I all fits inside the Dragon because I removed the RF-modulator.
The DC-DC Boost Buck Converter is this one: https://a.co/d/fOgiUwj
I've been using this solution for a couple of weeks and it all works without a problem. I use the Dragon with a CoCoSDC and for the video output a RGBtoHDMI which is connected using a mini-DIN through the former RF-modulator hole.
See the pictures for more details.
I am new to this forum, so maybe someone else already came up with the same solution, but I thought I'd share it anyway.
Using a Commodore64 PSU for the Dragon
Using a Commodore64 PSU for the Dragon
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Re: Using a Commodore64 PSU for the Dragon
Hi, and welcome to the Dragon Archive!
That is a nice solution for solving your need for a cpu, and it's as good as any other
I added a switched-mode power supply internally as I prefer to have everything together and not forget anything, nor having to look around for all the bits and pieces.
Thanks for the nice pictures!
Cheers,
Rob
That is a nice solution for solving your need for a cpu, and it's as good as any other
I added a switched-mode power supply internally as I prefer to have everything together and not forget anything, nor having to look around for all the bits and pieces.
Thanks for the nice pictures!
Cheers,
Rob
Re: Using a Commodore64 PSU for the Dragon
I like this solution because it should still be possible to use the original Dragon PSU.
I have wondered if you fed the DE9 plug with the correct DC voltages would that work?
I have wondered if you fed the DE9 plug with the correct DC voltages would that work?