Re: Anyone ever attach a mono LCD to a PET?

From: Ethan Dicks <>
Date: Tue, 8 May 2012 14:53:13 -0400
Message-ID: <>
On Tue, May 8, 2012 at 2:46 PM, Steve Gray <> wrote:
> Hi Ethan,
> I have looked for mono lcd screens on ebay for exactly the same purpose and
> haven't had any luck. the occasional one would be listed but at ridiculous
> prices.

Obviously, I'm not interested in ridiculous prices.

> I think you'd be better off with a color panel. VGA LCD monitors are
> quite cheap but these days it's hard to find one that syncs down low enough.

A standard VGA panel will _not_ sync down to 15KHz, which is why I
wasn't looking at those.

> I have an NEC 1550M unit that syncs down to 15kHz and I was hoping to try to
> hook that up to the pet somehow. I think you need to adjust the voltage
> levels though.

Level adjustment is easy enough - a simple voltage divider, or MOSFET
circuit or possibly even a 4066 should do the trick.

>  The other option is to go with a TV-type LCD unit that accepts composite,
> and just make a small adapter to convert the PET signals to composite. You
> can buy a small pre-made board on ebay for $25, but it's really just a
> single chip that should only cost a buck or so.

I know how to build a composite adapter for the PET, but having done
it in the past, I was less than thrilled with the results (adjustment
fiddliness and picture that was not rock-steady and sharp, unlike a
"real" PET display).


       Message was sent through the cbm-hackers mailing list
Received on 2012-05-08 19:00:31

Archive generated by hypermail 2.2.0.