[GreenKeys] USB/TTY Board Documentation

[Ken Wiebe]

No built-in current loop on 33. Needs 20ma. Here's another tidbit from Wayne:

"One feature the UCC-6 [33 power supply] has is 48 VAC on P2 pins 3 and 4 that can be used to supply AC voltage for a users power supply to generate a current loop."

**************

So this looks like a way to do it, but for me I wouldn't know where to start. Would need someone to spell it out for me.

Ken

On Sat, Sep 14, 2019, at 14:12, Jordan Spencer Cunningham wrote:
> All,
> 
> I forgot to mention-- should you run into trouble not addressed by the documentation, definitely feel free to ask questions. I'll do my best.
> 
> Ken,
> 
> It sounded like the M33s (or was yours a 32?) had a built-in current loop, but I just haven't dealt with anything newer than a M19 and so can't say for certain. So have you confirmed that there for sure *isn't *a current loop on board?
> 
> I hope to get a 33 sometime in the future, but that's probably not happening very soon.
> 
> Should someone be able to confirm one way or the other with these newer machines, I would be glad to publish the info on the documentation page so others can benefit from this knowledge.
> 
> -
> Jordan Spencer Cunningham
> teletype.net
> 
> 
> On Sat, Sep 14, 2019, at 2:54 PM, Ken Wiebe wrote:
>> Thanks, Jordan. What would be really appreciated for me, and possibly others, would be documentation covering connection of the board to a single TTY where there currently (no pun intended) is no current loop.
>> 
>> I'm still struggling with this.
>> 
>> There were some posts recently but the discussion quickly went over my head. I really need a step-by-step hand-holding in this area.
>> 
>> Anyone so inclined?
>> 
>> Thanks again!
>> 
>> Ken
>> 
>> On Sat, Sep 14, 2019, at 13:46, Jordan Spencer Cunningham wrote:
>>> Hi all,
>>> 
>>> As a general announcement, most of the info I wanted to get up on the Volpe Boards I've had manufactured is available at https://teletype.net/display/TEL/Volpe+USB+Interface+Board. I think most people will have received their boards by now-- some may still arrive next week with our international friends a week or so after that.
>>> 
>>> There are still some sections yet to be filled out, and I will be adding videos and such to hopefully help people of all experience levels learn how to use the board. The bulk of the necessary documentation is there, though.
>>> 
>>> I've also migrated the GreenKeys search engine to the same site. The styles for the search engine are a bit messed up for mobile right now making it unusable on mobile-- I'll get that sorted eventually.
>>> 
>>> You can see I have placeholders for a lot of other pages where to share other teletype-related info. Those are just a few things planned. Eventually I'll fill all that in and add even more pages. If there's anything anyone would like to contribute in the future-- from photos to videos to how-to articles or anything else-- I'd be glad to publish it credited to you. Heaven knows I'm a mere amateur compared to most of the people on this list, so I will only be able to share the few things I learn here and there or just link to other sites.
>>> 
>>> -
>>> Jordan Spencer Cunningham
>>> teletype.net
>>> 
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>> 
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> 
> ______________________________________________________________
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> 
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> 
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