Search found 10 matches

by Ready.
Fri Jan 19, 2018 8:20 am
Forum: Hardware
Topic: Certified idea for a repairable heavy duty power supply
Replies: 15
Views: 12394

Re: Certified idea for a repairable heavy duty power supply

In the end having a PSU with just the transformer to have it certified did not work out. I will instead stick to the design of a transformer at 50/60Hz as described here: http://danieleredivo78.wixsite.com/c64psu so far I made 7-8 units delivering up to 3.5A at 5V. The nice thing is that using DC-DC...
by Ready.
Fri Apr 07, 2017 4:40 pm
Forum: Hardware
Topic: Thermal dissipation, RF shielding and ways of improving the lot
Replies: 6
Views: 5772

Re: Thermal dissipation, RF shielding and ways of improving the lot

in 2 of my old breadbins I added some custom cooling, but since I HATE to drill the case to put fans, in this mod I used some special arrangement taking advantage of existing venting holes. So no C64 case was harmed. I just used hot plastic glue (easily removable) to put things in place. Runs very s...
by Ready.
Mon Apr 03, 2017 12:50 pm
Forum: Hardware
Topic: Commodore PSUs, voltage regulation, connectors et al
Replies: 7
Views: 5006

Re: Commodore PSUs, voltage regulation, connectors et al

I might bring a few C128 connectors with me during vacation this summer, then. If you come by the coast ;)
by Ready.
Mon Apr 03, 2017 11:47 am
Forum: Hardware
Topic: Commodore PSUs, voltage regulation, connectors et al
Replies: 7
Views: 5006

Re: Commodore PSUs, voltage regulation, connectors et al

while I am working on a version with separate AC-AC converter as separate box, I am also going forward with a version as described in my blog as a per assembled kit, so that the user would have to assemble the high voltage part by insertion of the transformer in the box following very easy steps, no...
by Ready.
Mon Apr 03, 2017 11:40 am
Forum: Hardware
Topic: Commodore PSUs, voltage regulation, connectors et al
Replies: 7
Views: 5006

Re: Commodore PSUs, voltage regulation, connectors et al

Hi Stealth, the schematic you provided will basically provide the needed function to run a c64/128 and a drive 1541-II. But the design I had in mind was to use DC-DC converters and avoid AC-DC ones. This because AC-DC have much higher voltage inside since it rectifies 220VAC, which means having arou...
by Ready.
Wed Mar 29, 2017 10:30 pm
Forum: Hardware
Topic: Certified idea for a repairable heavy duty power supply
Replies: 15
Views: 12394

Re: Certified idea for a repairable heavy duty power supply

Surely it would provide same results on secondary side, it will still create a path to dissipate High frequences, but on the secondary you need 2 filters, one per each secondary winding. So on the High voltage in more practical.
by Ready.
Wed Mar 29, 2017 6:23 pm
Forum: Hardware
Topic: Certified idea for a repairable heavy duty power supply
Replies: 15
Views: 12394

Re: Certified idea for a repairable heavy duty power supply

The measurements are from the inside of the c64, so it IS taken on the secondary.
by Ready.
Wed Mar 29, 2017 4:41 pm
Forum: Hardware
Topic: Certified idea for a repairable heavy duty power supply
Replies: 15
Views: 12394

Re: Certified idea for a repairable heavy duty power supply

this is a test I made with my self built PSU of switching on the C64 with PSU switch.
Without C-L-C filter bewteen switch and primary of transformer:
https://ibb.co/mU20ov
With C-L-C filter bewteen switch and primary of transformer:
https://ibb.co/f7AQMF
that's why I thought C-L-C filter is necessary.
by Ready.
Wed Mar 29, 2017 2:48 pm
Forum: Hardware
Topic: Certified idea for a repairable heavy duty power supply
Replies: 15
Views: 12394

Certified idea for a repairable heavy duty power supply

I have thought several ways to provide a new PSU to the Commodore community, but I've always got stuck on one point: certification. Selling non certified stuff puts the seller in a liable position in case anything bad should happen. There are several types of certification, but my biggest concern is...