26/01/17 - New update on the project here
I was working on the version 3 of the power adapter for Commodore 64 in the last 2 month, a new model that should correct all of the problem the last versions have.
I had started by replacing the modified sine wave by a pure sine wave, everything was going great but when I started testing the prototype, I realized that a pure sine wave generator was not enought to remove the buzzing noise coming from the common mode filter, to remove completely the noise I needed to have a isolation between the +5V and the 12V (or 15V).
Using 2 isolated voltage is not difficult but it would increase the price significantly, especially if I solder and assemble myself.
I have modified the prototype using 2 power adapter and it work great but the retail price would be too high for me at the moment for this solution, maybe when I start to do SMD assembly.
But when I say too high I compare it to another project I had at the same time for the C64, at the start I wanted to propose a AC power supply to complement the other power adapter but as the price should be really similar, this one will replace it, I had chosen to use a classic 9V transformer and a +5V regulated power supply, it's a complete AC power supply, to replace completely the original power adapter. It will be available in 110V and 230V and (I hope) before 2017.
13 commentaires
To Chris Verheijen :
The design is very simple, the picture explain it by itself. You can easily find part online by yourself but the shipping cost for the transformer, ABS case or even the PCB cost will be expensive.
To Gideon Zweijtzer :
I make a mold cable in China, same thing for the case.
Using two individual transformers, one for AC and one for DC is probably the easiest solution indeed. Just two modules. Not much hassle with certification either. How do you solve the power cable? Do you reuse the commodore cable, or do you have another solution? How about the case?
If you plan to produce in higher quantities, I may be able to help you having it assembled.
Hi,
Ive got six c64 ers with psu but i want to change the orginal psu if the orginal broke i have maybe also a broke c64.
But my question.
Do you have and electrical layout and can i but the parts to assemble at myself?
Met brother in law can solder SMD.