PVA seems to glue properly.
However, it's not as good as first thought.
After redoing five keys two don't work, so the bags are probably not evenly conductive.
Apples aren't the only fruit.
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stephen_usher
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Re: Apples aren't the only fruit.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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stephen_usher
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Re: Apples aren't the only fruit.
Ordered some metalised emergency blankets...
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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rubber_jonnie
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Re: Apples aren't the only fruit.
Would contact adhesive be better? I Wouldn't have thought PVA would work well with plastic etc.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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stephen_usher
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Re: Apples aren't the only fruit.
Contact adhesive may melt the plastic foam.rubber_jonnie wrote: Tue Feb 27, 2024 9:51 pm Would contact adhesive be better? I Wouldn't have thought PVA would work well with plastic etc.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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rubber_jonnie
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Re: Apples aren't the only fruit.
Ahh, good point.stephen_usher wrote: Tue Feb 27, 2024 10:01 pmContact adhesive may melt the plastic foam.rubber_jonnie wrote: Tue Feb 27, 2024 9:51 pm Would contact adhesive be better? I Wouldn't have thought PVA would work well with plastic etc.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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rubber_jonnie
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Re: Apples aren't the only fruit.
Just realised I had this:
Might be something to consider, it's metal tape with adhesive on one side, came with my PGA reballing machine for using to isolate components from heat.
- IMG20240228111852.jpg (228.21 KiB) Viewed 853 times
Might be something to consider, it's metal tape with adhesive on one side, came with my PGA reballing machine for using to isolate components from heat.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Re: Apples aren't the only fruit.
That tape is quite a low resistance. We use it at work for boiler lagging.
What about conductive painting the surfaces?
What about conductive painting the surfaces?
If it ain't broke, test it to Destruction.
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stephen_usher
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Re: Apples aren't the only fruit.
I bought some mylar emergency blankets and tried making some pads tonight.
As long as you make sure that the metalised surface is AWAY from the PCB, i.e. on the foam side, they work well. The metalised side is very conductive so it causes a short.
The foil coated foam isn't great, so next stuff to try... weather proofing strip. You can get it as 12mm wide and 3mm thick strips with adhesive on both sides. Stick the mylar to one side and the plastic disc on the other. Well, that's my plan. It's also cheap.
As long as you make sure that the metalised surface is AWAY from the PCB, i.e. on the foam side, they work well. The metalised side is very conductive so it causes a short.
The foil coated foam isn't great, so next stuff to try... weather proofing strip. You can get it as 12mm wide and 3mm thick strips with adhesive on both sides. Stick the mylar to one side and the plastic disc on the other. Well, that's my plan. It's also cheap.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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stephen_usher
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Re: Apples aren't the only fruit.
The issue is that the keyboard uses capacitance rather than conductance. If you try foil (which I did at first) things go haywire as it bridges the traces and causes a short.PhilC wrote: Wed Feb 28, 2024 7:23 pm That tape is quite a low resistance. We use it at work for boiler lagging.
What about conductive painting the surfaces?
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
Re: Apples aren't the only fruit.
Ok that makes sense. Good luck with trying to replicate that, I’ll be very interested to hear how you manage itstephen_usher wrote: Wed Feb 28, 2024 8:04 pmThe issue is that the keyboard uses capacitance rather than conductance. If you try foil (which I did at first) things go haywire as it bridges the traces and causes a short.PhilC wrote: Wed Feb 28, 2024 7:23 pm That tape is quite a low resistance. We use it at work for boiler lagging.
What about conductive painting the surfaces?
If it ain't broke, test it to Destruction.