Using a Commodore64 PSU for the Dragon
Posted: Tue Oct 03, 2023 2:29 pm
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.
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.