Search found 7 matches

by jpx072
Thu May 15, 2014 7:06 am
Forum: Hardware
Topic: Power supplies
Replies: 31
Views: 35032

Re: Power supplies

I tried to remove the regulators from the board. Same results.... :-(
But I suspect the lower voltage, for example - on a famicom, 0,5V lower voltage causes heavy graphical glitches.
Going to try different PSU.
Also thinking about different GND for power part and computer part...
by jpx072
Thu May 15, 2014 5:58 am
Forum: Hardware
Topic: Power supplies
Replies: 31
Views: 35032

Re: Power supplies

I checked the schematics and found out that it should work. But I think I have not enough Volts on 12V line, I measured it more precisely and it's showing only 11,3V. Will try something and report. -5V on RAMs is ok.
by jpx072
Mon May 12, 2014 7:21 pm
Forum: Hardware
Topic: Power supplies
Replies: 31
Views: 35032

Re: Power supplies

Thanks for the schematics! I am familiar with PSU functioning ;) I have measured voltage inside CV on the regulators and it was ok, so I will study the schematics first. I do have an image, the TV recognizes AV input, and I have dark blue screen. With cartridge I get a small short white line in the ...
by jpx072
Mon May 12, 2014 1:00 pm
Forum: Hardware
Topic: Power supplies
Replies: 31
Views: 35032

Re: Power supplies

Hello Thomas! Yes a schematic would be great, as I need to figure out where to put the input, because my original plan with powering the regulators' output pins doesn't work. Good thing is that a PC PSU has all three needed voltages (+5,-5,+12) and I don't have a tape extension. I soldered wires fro...
by jpx072
Sun May 11, 2014 12:04 pm
Forum: Hardware
Topic: Power supplies
Replies: 31
Views: 35032

Re: Power supplies

Thanks for the answer, I will try something and post my results later. I will not remove anything, just solder two wires from PC PSU directly to output pins of 7805 and 7812.
by jpx072
Sun May 11, 2014 8:07 am
Forum: Hardware
Topic: Power supplies
Replies: 31
Views: 35032

Re: Power supplies

Has anyone tried to power the CreatiVision with something else than the mentioned power requirements? I mean inside of the machine, I think there is a simple diode bridge (or similar) to turn AC to DC and right after there are two DC voltage regulators 7805 and 7812, which produce 5V and 12V - both ...
by jpx072
Thu May 08, 2014 11:55 am
Forum: Introduce yourself!
Topic: Hello from JPx72
Replies: 2
Views: 4232

Hello from JPx72

Hi! I am JPx72 and I am a collector of oldschool video-consoles! My homeland is Slovakia and I have stumbled upon this forum by searching a way to get some composite output for my CreatiVision MK-II, that found a way to my home from (if I understand it right) Scouter3d, a member here! This machine w...