Date   : Fri, 05 May 2006 07:53:30 +0100
From   : Rob <robert@...>
Subject: Re: Mystery Item

At 00:57 05/05/2006, Andy Armstrong wrote:

>On 4 May 2006, at 22:38, Peter Rendle wrote:
>
>>Does anyone recognise this: http://www.hellion.demon.co.uk/ebay/ 
>>Mystery%20BBC%20Thing/
>>It looks like it was in use until at least 2001 (It has a 2001
>>Electrical safety sticker on it).
>>The wedge was a teletext adapter.  The chips are 2 x quad opto
>>isolators and 2 buffer chips.
>>The cables are user port and printer port.
>>
>>The signature on the PCB looks like "R Tonks"
>
>Well it's a digital I/O box I guess :)
>
>I've no idea about provenance though.

Yep.. looks like relay isolated outputs across the top of the box, 
common ground at the back, switched conenctions at the front, with 
LED status indicators, between, and maybe jack plug inputs on the 
sockets across the label.

Try poking a few values to the printer port (sorry too soon after 
getting up to tell you how) and see if the lights change.

Rob