[GreenKeys] USB/Teletype Boards Ready to Ship

[epvgk at limpoc.com]

On Fri, Sep 06, 2019 at 03:26:41PM -0700, Richard Knoppow wrote:
>    Another poster said he thought these were expensive. If this is the
> device on the web site linked below I think they are quite cheap. I have a
> little experience with manufacturing and have some understanding of the
> costs involved. $35 seems cheap to me. Maybe I am missing something.

I think a lot of greenkeys folks have chosen to stay with computers from the 
1980s - 1990s with the associated RS232 serial ports etc and I guess with those 
you can get away with a couple of power transistors. 

I think for something that safely connects a 100+V loop to a modern computer 
and "just works" without a lot of fiddling around, it's pretty reasonable.

Of course, you need to have an application for it. If you only need to decode
AFSK off the air or from ITTY, it's not what you want. 

eric



> 
> On 9/6/2019 3:14 PM, Jordan Spencer Cunningham wrote:
> >There have been a few questions on this manufacturing venture, so I'll
> >send more details publicly to hopefully answer most of them, and then I'll
> >answer anything else privately.
> >
> >Back in April I started the process of manufacturing a run of Eric Volpe's
> >USB to TTY interface board. It allows you to connect a computer to a
> >current loop. It supports 20ma and 60ma loops. Out of the box it supports
> >ITA2 (5-bit) machines and ASCII (7-bit) machines, though you could
> >customize some configurations to do other encodings if needed. It also
> >supports any baud rate from 45 baud up to at least 1200 baud (these
> >haven't all been thoroughly tested, but they should work).
> >
> >Basically it enables your computer to act like a teletype on a current
> >loop-- sending and receiving text.
> >
> >It's very versatile; I've loved working with these boards.
> >
> >I was able to manufacture them for $35 each (including shipping to the
> >continental U.S.). I still have some available for those interested. This
> >includes the fully manufactured board preprogrammed to work out of the
> >box.
> >
> >More technical details are available at Eric's site here
> ><https://heepy.net/index.php/USB-teletype>. I am also creating additional
> >documentation and help videos to supplement this-- a link will be shared
> >soon.
> >
> >-
> >Jordan Spencer Cunningham
> >teletype.net <https://teletype.net>
> >
> >
> >On Tue, Sep 3, 2019, at 5:02 PM, Jordan Spencer Cunningham wrote:
> >>Hi all,
> >>
> >>Those of you who made orders for these boards should have just received
> >>a message with details about your USB/TTY interface board order. If you
> >>didn't, please check your spam and let me know if it's not even there--
> >>it seems there may have been a few of you whose inboxes somehow ate some
> >>of my previous messages.
> >>
> >>In short, I will be shipping boards starting Friday.
> >>
> >>Those of you who didn't make an order but wish you did are also in
> >>luck-- I currently have 31 boards unclaimed. You're welcome to tag
> >>along.
> >>
> >>Thanks much, and have a great day.
> >>
> >>-
> >>Jordan Spencer Cunningham
> >>teletype.net <https://teletype.net>
> >>
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> >>
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> >>Message delivered to js at teletype.net
> >
> >
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> >
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> 
> -- 
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
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> 
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