LCD Output for ZX81

Discussions about Sinclair ZX80 and ZX81 Hardware
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RWAP
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LCD Output for ZX81

Post by RWAP »

Has anyone looked into connecting an LCD direct to the ZX81 rather than using a TV - it could then be turned into a portable computer....
McKlaud
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Re: LCD Output for ZX81

Post by McKlaud »

Hi Rich,

I've been using a 4.3" LCD monitor with a composite input, similar to this one:

Image

I did a special supply cable, and I use a UK1200 PSU for feeding the Zeddy and the monitor. The monitor fits well on the top of the Zeddy case and works fine with a modified video output.
Claudius
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mhudson52
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Location: Decatur, Alabama (US)

Re: LCD Output for ZX81

Post by mhudson52 »

This is what I did to mine.
26170270_10211488372548546_3640313592903088236_o.jpg
TS 1000 bought in 1982 and brought back to life by Sir Ian
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siggi
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Re: LCD Output for ZX81

Post by siggi »

There are severaöl ZX81 laptops around.
I have one, which could be seen here at Zx-Team Meeting in Mahlerts (incl. a LEGO docking station, containg a keyboard-interface card, a sound card, a ZeddyNet card and a jostick card :mrgreen: ):
https://www.youtube.com/watch?v=P1Uo_TUB65c

Siggi
My ZX81 web-server: online since 2007, running since dec. 2020 using ZeddyNet hardware
http://zx81.ddns.net/ZxTeaM
mcarlson_sb
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Location: San Francisco

Re: LCD Output for ZX81

Post by mcarlson_sb »

Frustratingly I have a 7inch LCD that looks exactly like the one pictured by mhudson52

However, I can't get a good signal with it.
(works fine on my Samsung TV, so I know the ULA is good)

I've ordered a second 4.3 inch that looks very much like the one pictured by McKlaud - I'll see if it works when it gets here.

It seems that I might have to go through a pile of them to find one that works.
mcarlson_sb
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Location: San Francisco

Re: LCD Output for ZX81

Post by mcarlson_sb »

Second one almost worked.
However the last few lines of the screen don't display. So you can't see what you are typing. But it showed "Hello World" clearly on the first line :roll:
mcarlson_sb
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Re: LCD Output for ZX81

Post by mcarlson_sb »

I found one that works well.
The hint was to find one with at least 1024x600 resolution.

https://www.amazon.com/gp/aw/d/B07NQ3RJ ... asin_title
20200411_185904.jpg
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