Fuller FD42 Keyboard

Discussions about Sinclair ZX80 and ZX81 Hardware
Tezz
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Re: Fuller FD42 Keyboard

Post by Tezz » Tue Oct 23, 2018 3:17 pm

Thanks Mark, that's a good idea.

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gammaray
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Re: Fuller FD42 Keyboard

Post by gammaray » Wed Oct 24, 2018 2:04 am

Right. My design only allows connection at the rear. It is not easily modifiable to accommodate through holes. Starting over in EASYEDA using proper pads through holes and traces.
5-TS1000,UK ZX81<-Sheelagh, US ZX81, 2-TS1500/KDLX , 3-TS2040 printer, 2-TS2020 cassette decks, ZXPAND+AY, ZeddyNET, ZXBlast, UDG, ZX8CCB, AERCO, BUILDS/REPAIRS ZX Spectrum, ZX80 Minstrel, ZXMAX48 v1 v2, 2-TS-2068, ROM, 16kRAM

Tezz
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Re: Fuller FD42 Keyboard

Post by Tezz » Fri Jan 18, 2019 2:45 pm

Hi all,

I'm getting back to finally sorting out the recreated FD42 extension board. Mr Robot on the AtariAge forums kindly created the PCB layout for me. Thanks also to Charles/Gammaray for the correct dimensions of the expansion port BUS. I took Marks advice to go with header pins for the vertical connector. I've attached the 3d renders of the proposed PCB which are currently missing the tracks as I was confirming the dimensions inside the case with paper templates. The renders show the header pins in place on the break off vertical connector but they will of course be right angled pins installed there.

Would it be possible to make up a two way connector to attach the extension to the 81 board without soldering? The extension PCB will have all double sided edge connectors.
latest_pcb_render1.png
latest_pcb_render2.png
latest_pcb_render3.png
latest_template.png
The current template inside the case

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mrtinb
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Re: Fuller FD42 Keyboard

Post by mrtinb » Fri Jan 18, 2019 3:10 pm

If you have this connector next to the edge of your board, you can solder the top pins to the top and the bottom pins to the bottom.

You will have to make your board shorter for the connector to fit.

Image

Like this:

Image
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

Tezz
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Re: Fuller FD42 Keyboard

Post by Tezz » Fri Jan 18, 2019 3:25 pm

Thanks Martin, will look at revising the design.

Tezz
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Re: Fuller FD42 Keyboard

Post by Tezz » Fri Jan 18, 2019 9:32 pm

I do still need to buy the edge connector, does anyone know if there are any still for sale as Pokemon is not showing any available at the moment.

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mrtinb
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Re: Fuller FD42 Keyboard

Post by mrtinb » Fri Jan 18, 2019 9:39 pm

On his profile I can see he has 4 left. If you click "Notify When Back in Stock", you will get a notification when he opens his store again. Usually he closes the offers when he is on vacation.

You can also buy from eBay, but will have to cut it to size yourself.
https://www.ebay.co.uk/itm/Sinclair-ZX- ... 0906239646
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

Tezz
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Re: Fuller FD42 Keyboard

Post by Tezz » Sat Jan 19, 2019 4:51 pm

Thanks Martin, I'll set the notify option to pick some up when Pokemon is back.

Tezz
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Re: Fuller FD42 Keyboard

Post by Tezz » Sat Jan 19, 2019 7:34 pm

Once I've got the extension made up I'm planning to install a barrel jack socket connected to an on/off rocker switch so I can use a good quality modern barrel type power supply of the correct rating. I should also modify the Zxpand+ so I can have the SDcard on the back of the case too. Any advice with any of those points would be gratefully received. I should then finally have a nice setup to use :D

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gammaray
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Re: Fuller FD42 Keyboard

Post by gammaray » Sat Jan 19, 2019 10:31 pm

SDCARD EXTENSION.jpg
SDCARD EXTENSION.jpg (5.69 KiB) Viewed 437 times
5-TS1000,UK ZX81<-Sheelagh, US ZX81, 2-TS1500/KDLX , 3-TS2040 printer, 2-TS2020 cassette decks, ZXPAND+AY, ZeddyNET, ZXBlast, UDG, ZX8CCB, AERCO, BUILDS/REPAIRS ZX Spectrum, ZX80 Minstrel, ZXMAX48 v1 v2, 2-TS-2068, ROM, 16kRAM

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