[GreenKeys] USB-teletype adapters (update)

[Eric]

On 03/26/2016 11:15 pm, Gil Smith wrote: 

> Sheesh, been a while on 33 data format. Maybe Wayne or Jack or Jim or somebody will add something. I seem to recall it was 8 bits (7 ascii plus mark in top bit maybe?), no extra parity bit, and needed two stops for the mechanics. Something like that. 
> 
> What pcb layout prog did you use? What fab/assy place? Tiny stuff. Nicely done. 
> 
> gil

Well, I guess at some point I'll get someone to try one of these on a 33
and see if it works. The bitbanged serial uart isn't too complicated so
it can probably be made compatible. 

Thanks, the design was done with Eagle, and the board fab and assembly
are being done by Myro in China. I quoted it with a bunch of companies
and these guys win in terms of price and being fairly easy to deal with,
for instance I was able to just supply them a Digikey parts list. They
also did most of the rtty demod boards last time around. My only
complaint with them is that they're a little sloppy with drill
placement, but it's fine if you plan for it. I dunno if I'd try BGA
stuff with micro-vias though. 

I had the prototype boards assembled by Seeedstudio.com, who have great
prices and are very fast, but are not as easy to deal with and will only
do assembly with parts they supply/stock, which is annoying because a
half-populated board isn't that useful in bulk. (I hand soldered the
other half of the parts on those, but I'm not doing that for 80 units!) 

> gil smith, AF7EZ
> greenkeys moderator
> gil at baudot.net 
> 
> -------- Original Message --------
> Subject: RE: [GreenKeys] USB-teletype adapters (update)
> From: Eric <epvgk at limpoc.com>
> Date: Sat, March 26, 2016 9:18 pm
> To: Gil Smith <gil at baudot.net>
> 
> On 03/26/2016 8:56 pm, Gil Smith wrote: 
> Nice job on that board Eric. 
> Regarding the 33, in addition to it being 110 baud, be sure to put 2 stop bits in. 
> gil 
> Ah thanks, I was hoping someone would chime in. Do you know if they want or require parity bits, or whether they need delays inserted for carriage return? 
> eric 
> gil smith, AF7EZ
> greenkeys moderator
> gil at baudot.net 
> 
> -------- Original Message --------
> Subject: [GreenKeys] USB-teletype adapters (update)
> From: epvgk at limpoc.com
> Date: Sat, March 26, 2016 1:51 pm
> To: greenkeys at mailman.qth.net
> 
> Hi Folks, 
> 
> Just an update. Manufacturing is in progress, they're supposed to be done
> April 20th. I'm building enough for everyone who's asked so far plus some
> extras. I don't want to take anybody's money until the boards are in my 
> hands and I know there are no problems. 
> 
> Software updates:
> 
> selectable/modifiable translation tables: you can have up to 6 separate
> tables and switch between them. You can create or overwrite tables
> by entering them in hex at the config command line. 
> 
> bidirectional break handling: detects break in the loop, and can break the
> loop if it gets a break signal from the host. 
> 
> ASCII mode: seems to work, but I have no 33 to test with. Particularly I don't 
> know how real machines handle/require parity, etc. 
> 
> eric
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys [1]
> Help: http://mailman.qth.net/mmfaq.htm [2]
> Post: mailto:GreenKeys at mailman.qth.net
> 
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys [3]/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html [4]
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html [5]
> 
> This list hosted by: http://www.qsl.net [6]
> Please help support this email list: http://www.qsl.net/donate.html [7]
> Message delivered to gil at baudot.net

 

Links:
------
[1] http://mailman.qth.net/mailman/listinfo/greenkeys
[2] http://mailman.qth.net/mmfaq.htm
[3] http://mailman.qth.net/pipermail/greenkeys
[4] http://mailman.qth.net/archive/greenkeys/greenkeys.html
[5] http://comcents.com/tty/greenkeyssearch.html
[6] http://www.qsl.net
[7] http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20160327/3c745166/attachment.html>