Search found 161 matches

by Tezz
Thu Aug 10, 2017 6:07 pm
Forum: Hardware
Topic: New find zx81 and updates
Replies: 12
Views: 714

Re: New find zx81 and updates

craftsman1234 wrote:
Tue Aug 08, 2017 11:09 pm
I really want to use my Commodore monitors but I need to be able to load the ZX via OLTA and space wont allow for a big monitor.
I'm in the same boat there, my Amiga multisync monitor has been in storage for many years.
by Tezz
Tue Aug 08, 2017 10:42 pm
Forum: Hardware
Topic: New find zx81 and updates
Replies: 12
Views: 714

Re: New find zx81 and updates

Indeed and the wonderful digital scaling :cry: I usually do correctly refer to modern CCFL/LED TVs as LCDs. For a quiet life I stopped bothering as people seem these days to prefer calling CCFL backlit screens LCDs and LED backlit screens simply as LEDs to differentiate between them.
by Tezz
Tue Aug 08, 2017 2:58 pm
Forum: Hardware
Topic: New find zx81 and updates
Replies: 12
Views: 714

Re: New find zx81 and updates

Thanks, I've only tried mine on a 1999 CRT TV that I have in the back room which gave a very good output. I should take a look on the modern LED TVs that I have in the house too to see how it fairs.
by Tezz
Mon Aug 07, 2017 10:27 am
Forum: Hardware
Topic: New find zx81 and updates
Replies: 12
Views: 714

Re: New find zx81 and updates

The 555 design came from JoulesperCoulomb YouTube videos. On his design there are 4 resisters. I replaced the 68 and 56 ohm resisters with 100 ohm pots. For me R4 the 56 ohm did the more adjustment to the output. The POTs do cause some issues with it fitting in the RF shield. I don't really know wh...
by Tezz
Sun Aug 06, 2017 4:43 pm
Forum: Hardware
Topic: New find zx81 and updates
Replies: 12
Views: 714

Re: New find zx81 and updates

Good stuff, I've made a few of the 555 based Composite video boards too, do you have a details of adding the turn based pots? That was something that I wanted to get around to asking advice on here :)
by Tezz
Tue Aug 01, 2017 8:09 pm
Forum: Hardware
Topic: Fuller FD42 Keyboard
Replies: 33
Views: 1535

Re: Fuller FD42 Keyboard

I've started to vector trace the extension PCB photo now in Illustrator. I'm not able to see the connector under the 16K expansion that's plugged into it in the photo but once I have the accurate measurements I can try a first test print out to see how well everything lines up inside the case.
by Tezz
Sat Jul 22, 2017 10:16 pm
Forum: Hardware
Topic: Fuller FD42 Keyboard
Replies: 33
Views: 1535

Re: Fuller FD42 Keyboard

1024MAK wrote:
Sat Jul 22, 2017 8:35 pm
I use thin double sided tape carefully cut to size for fixing partly loose labels.

Mark
Thanks Mark, I think I should retain the original sticker.
by Tezz
Sat Jul 22, 2017 10:15 pm
Forum: Hardware
Topic: Fuller FD42 Keyboard
Replies: 33
Views: 1535

Re: Fuller FD42 Keyboard

gozzo wrote:
Sat Jul 22, 2017 9:18 pm
that fuller with the extension, and, yes, rampack is mine 😉 if you'd like the dimensions of the extender board, give me a few days to dig it out (part of my 'round to it' pile) and measure things 😁
That would be great thanks!
by Tezz
Sat Jul 22, 2017 8:24 pm
Forum: Hardware
Topic: Fuller FD42 Keyboard
Replies: 33
Views: 1535

Re: Fuller FD42 Keyboard

The case and keyboard cleaned up well :) I just need the expansion port extension now. I'm not sure whether to remove the sticker or glue it back down where it's lifted. Fuller_FD42_2.png Fuller_FD42_1.png Here's a couple of photos of the back/side of the case where you can see that the ports are th...
by Tezz
Fri Jul 21, 2017 2:03 pm
Forum: Hardware
Topic: Fuller FD42 Keyboard
Replies: 33
Views: 1535

Re: Fuller FD42 Keyboard

Thanks Mark, that's helpful to see for reference. I'm not sure how to tackle the vertical internal edge connector, if that could be made as a separate part to attach to the main extension board manually I could then get a simple PCB manufactured. I'll start working on the layout in illustrator tonig...