ASR33 Teletype interfacing

From: Antonio Carlini <arcarlini_at_iee.org>
Date: Sat Oct 11 15:33:32 2003

Must have been a temporary blip, as it's there now.

 

-- 
---------------
Antonio Carlini             arcarlini_at_iee.org
> -----Original Message-----
> From: cctalk-bounces_at_classiccmp.org 
> [mailto:cctalk-bounces_at_classiccmp.org] On Behalf Of Joe
> Sent: Saturday, October 11, 2003 7:19 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Cc: waltje_at_pdp11.nl
> Subject: Re: ASR33 Teletype interfacing
> 
> 
> Fred,
> 
>   I tried to access the website and got an error stating that 
> it could not be found. I tried to access the domain itself 
> and I got an error stating that it's not configured yet and 
> to try again later.
> 
>    Joe
> 
> 
> At 07:19 PM 10/11/03 +0200, you wrote:
> >On Sat, 11 Oct 2003, Ian Primus wrote:
> >
> >> > If you want to receieve also, you can use another transistor and 
> >> > resistor to pick off the change in loop current that 
> happens when 
> >> > you press keys which open the loop, and drive the serial port.
> >> >
> >> > I've done one of these fairly recently, and if poked with a 
> >> > not-too-sharp stick, I'll scan the schematic and pu on 
> my website.
> >
> >I found a 20mA interface schematic in my pile of docs.. I 
> put it up on 
> >http://www.pdp11.nl/Hardware/20mA.pdf
> >
> >Cheers,
> >	Fred
> >--
> >Fred N. van Kempen, DEC (Digital Equipment Corporation) 
> Collector/Archivist
> >Visit the VAXlab Project at                     
> http://www.pdp11.nl/VAXlab/
> >Visit the Archives at            
>                       http://www.pdp11.nl/
> >Email: waltje_at_pdp11.nl         BUSSUM, THE NETHERLANDS / 
> Sunnyvale, CA, USA
> >
> >
> 
> 

Received on Sat Oct 11 2003 - 15:33:32 BST