Search found 34 matches

by cheshirenoir
Mon Jan 11, 2021 11:35 am
Forum: Your collection
Topic: MADrigal's creatiVision collection
Replies: 82
Views: 81432

Re: MADrigal's creatiVision collection

Nice scores there, MADrigal.
Would it be practical to scan in the books?
by cheshirenoir
Thu Dec 31, 2020 12:29 am
Forum: Off-topic
Topic: Seasons Greetings All
Replies: 5
Views: 733

Re: Seasons Greetings All

No worries. Well, if I manage to get my hands on one, I'll open it up and trace the board.

Chesh
by cheshirenoir
Wed Dec 30, 2020 7:14 am
Forum: Off-topic
Topic: Seasons Greetings All
Replies: 5
Views: 733

Re: Seasons Greetings All

Ooh that sounds really interesting MADrigal. Definitely will need a better keyboard ;-) On that front, does anyone have a schematic for the Moving Key Keyboard? I suspect it'll be a simple enough design. I want to make a proper Mechanical keyboard for the CreatiVision. Obviously i'll open source the...
by cheshirenoir
Wed Dec 30, 2020 4:22 am
Forum: Hardware
Topic: CreatiVision with distorted output then crash
Replies: 6
Views: 403

Re: CreatiVision with distorted output then crash

Well, it looks like it WAS a dry joint. Went over the board with a magnifier, marked all dubious looking solder points and went and resoldered all of them. There was a "bodge wire" that was particularly loose, between the lower RF shield and ground, so I wonder if that was my weak point.

Chesh
by cheshirenoir
Wed Dec 30, 2020 2:50 am
Forum: Hardware
Topic: CreatiVision with distorted output then crash
Replies: 6
Views: 403

Re: CreatiVision with distorted output then crash

OK so more info. I think I must have a dry joint somewhere, so I'll pull it apart and see what I can spot. When the distortion starts, if I give the unit a tap on the top, the distortion goes away. Hope it's not below the lower shield.
by cheshirenoir
Tue Dec 29, 2020 5:17 am
Forum: Hardware
Topic: CreatiVision with distorted output then crash
Replies: 6
Views: 403

Re: CreatiVision with distorted output then crash

Well, I finally got the Wizzard on the bench again, and the voltages look within what'd I'd expect the tolerances to be. The AC is putting out 17v unloaded on the 16v line and 10v unloaded on the 9v line. On the inside, measured at the pins for the 4116 RAM I get +5 = 5.02 +12 = 11.9 -5 = -5.2 This ...
by cheshirenoir
Sat Dec 26, 2020 1:41 am
Forum: Homebrew software and hardware (excluding games)
Topic: Eprom Simulator
Replies: 8
Views: 5283

Re: Eprom Simulator

Nice!
Also quite a reasonable price, by the looks of things.

Chesh
by cheshirenoir
Thu Dec 17, 2020 1:10 am
Forum: Hardware
Topic: CreatiVision with distorted output then crash
Replies: 6
Views: 403

Re: CreatiVision with distorted output then crash

Thanks Scouter3d,
Hadn't thought of the internal voltage regulators!
(May swap them over with a minature switchmode 7805 replacement)

Chesh
by cheshirenoir
Wed Dec 16, 2020 3:55 am
Forum: Hardware
Topic: CreatiVision with distorted output then crash
Replies: 6
Views: 403

CreatiVision with distorted output then crash

Hey all, My CreatiVision seems to have developed a fault, and before I start ripping it apart, I thought I'd check if any of you have seen this issue. On bootup it's fine for a few minutes, then the picture starts to distort and the speaker makes a loud buzzing noise. The best way I could describe t...
by cheshirenoir
Fri Dec 11, 2020 1:12 am
Forum: Off-topic
Topic: Seasons Greetings All
Replies: 5
Views: 733

Seasons Greetings All

It's been a bit quiet here recently, but I hope you're all having fun with your CreatiVision goodies. It's been an interesting year for me. Got my first Dick Smith Wizzard. Worked with Clockmeister to develop up his design for the open source multicart. From nothing to lots in no time at all :-D I s...