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Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment.

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Old 15th Feb 2019, 1:39 am   #21
SiriusHardware
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Default Re: Maplin Z80 CPU card

Very nice! The only thing I would maybe add is a transparent red window in front of the displays - if you can find one. I thought it would be trivial to find one, but they seem quite hard to come by now.
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Old 17th Feb 2019, 12:08 pm   #22
Mirak005
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Default Re: Maplin Z80 CPU card

Yes - definitely needs a window for the 7 seg displays.

Still working on it ;-)

S
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Old 23rd Feb 2019, 12:28 pm   #23
Slothie
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Default Re: Maplin Z80 CPU card

Quote:
Originally Posted by SiriusHardware View Post
Very nice! The only thing I would maybe add is a transparent red window in front of the displays - if you can find one. I thought it would be trivial to find one, but they seem quite hard to come by now.
You could try "lighting filter gel" which is cheap but flexible so might need sandwiching between a couple of thin sheets of clear plastic or similar.
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Old 24th Feb 2019, 7:16 pm   #24
SiriusHardware
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Default Re: Maplin Z80 CPU card

An example of a reasonably priced, UK sourced filter meant for the purpose - from memory though it may not be wide enough for the display on the Maplin system - probably meant to cover the four or six digits of a typical digital clock project.

https://www.bitsbox.co.uk/index.php?...oducts_id=2686

If you're a good craftsman you could butt two of them up against each other to cover the whole display with the join on the boundary between two display cells, or perhaps contact the supplier to see if they can source a longer window?

(I have not used this supplier myself).
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Old 25th Feb 2019, 7:38 am   #25
Slothie
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Default Re: Maplin Z80 CPU card

RS do a large 130mm x 220mm filter but its 33!

https://uk.rs-online.com/web/p/products/0588724/
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Old 25th Feb 2019, 12:55 pm   #26
SiriusHardware
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Default Re: Maplin Z80 CPU card

I did see those, but they were outside the boundaries of what I considered 'reasonable'. I would be astonished if they ever sell any at that price.
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