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Video noise after installing DreamPSU

Posted: Wed Apr 12, 2023 1:34 pm
by VictorM
Hello ,i have a pal console with gdemu , iv ordered a DreamPSU from bitfunxk but i notice a slightly noise on video after upgrading, iv put back the old psu and its gone, anyone know how to get rid of this? maybe i just keep the old psu instead if cant solve it.

Thanks.

Re: Video noise after installing DreamPSU

Posted: Wed Apr 12, 2023 4:20 pm
by ItalianGrandma
Are you using a power brick that Bitfunx provided with the DreamPSU? It might work better if you use a higher quality power supply that is 12v5a…I think the ones that Bitfunx sells are 12v3a.

Re: Video noise after installing DreamPSU

Posted: Wed Apr 12, 2023 4:47 pm
by MoeFoh
ItalianGrandma wrote:Are you using a power brick that Bitfunx provided with the DreamPSU? It might work better if you use a higher quality power supply that is 12v5a…I think the ones that Bitfunx sells are 12v3a.
Grandma is correct. A higher quality 12v adapter UL Listed will fix the noise issue. Noise supression on the DreamPSU itself is non-existent, unfortunately. They're using the reference design.

Re: Video noise after installing DreamPSU

Posted: Sat Apr 15, 2023 4:32 pm
by VictorM
I bought one but still having issues, will try another of better quality. Thanks.

Re: Video noise after installing DreamPSU

Posted: Sat Apr 15, 2023 5:36 pm
by ItalianGrandma
VictorM wrote:I bought one but still having issues, will try another of better quality. Thanks.
I bought this one as recommended by Laser Bear Industries: https://a.co/d/fhgsruG

It seems really sturdy and well made. I used it briefly with my dreampsu, but I was using it via composite on a CRT so if there was any noise, I may not have noticed. My friend actually removed the 12v from my stock PSU today, so I switched back to that.

Re: Video noise after installing DreamPSU

Posted: Sat Apr 15, 2023 9:21 pm
by CrashMidnick

Re: Video noise after installing DreamPSU

Posted: Thu Apr 20, 2023 2:04 pm
by VictorM
Thank you all, i tried to switch to original PSU and using 1k resistors but still getting very hot, i hope i can find solution for the china dreampsu, if not will try another solution. Thanks

Re: Video noise after installing DreamPSU

Posted: Thu Apr 20, 2023 2:14 pm
by VictorM
This is exactly the problem i have by the way.

https://www.reddit.com/r/dreamcast/comm ... laying_on/

Thanks all.

Re: Video noise after installing DreamPSU

Posted: Thu Apr 20, 2023 2:26 pm
by CrashMidnick
Again, this is a PSU problem. Try one from the links above.

Re: Video noise after installing DreamPSU

Posted: Sat May 20, 2023 5:25 am
by Metro City
I too have a DreamPSU, it worked for a few months, now when I turn on the DC I see the black screen with no video, I connected an hdmi cable that the led does not light up, surely it is the power supply that is not powerful enough, I solved it by putting an original 220v power supply now it's great!!!