[hpsdr] Hermes J16 breakout board

[John Ackermann]

Based on some excellent feedback, I've revised the design a bit to allow:

1.  Jumpers JP1 and JP2 let each of tip and ring on the PTT jack to go 
to either PTT-IN or PTT-OUT.  That allows more flexibility in cabling, 
and also the ability to disable either signal on the jack if desired by 
leaving the jumper off.

2.  Jumper JP3 allows the ring of the LINE-IN jack to be either PTT-IN, 
or right channel line in.  It's been pointed out that there may be 
enough gain on the line-in channel to allow use directly with a 
microphone, and if so, this would allow a rear-panel mic connection with 
PTT.

3.  To make room for the above, instead of a 10 pin header with multiple 
PTT-IN and PTT-OUT, there's now one 2 pin header for each.  Hopefully 
with the increased flexibility from the other changes, that's enough.

New schematic and layouts are at
http://www.febo.com/pages/hpsdr/hermes_breakout/index.html

John

PS -- it looks so far like there's enough interest for over 20 boards. 
That will certainly help bring the price down for everyone!  There's 
still time to sign up if you're interested.

----
John Ackermann said the following on 08/03/2013 02:30 PM:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Yesterday I mentioned that I was working on a breakout board to access
> the commonly-used signals on Hermes J16.  I now have a first-draft
> schematic and board layout finished -- you can take a look at
> http://www.febo.com/pages/hpsdr/hermes_breakout/index.html
>
> The board is about 1.25 x 1.5 inches and has five 3.5mm jacks providing
> access to the right speaker, headphone, line out, line in, and
> PTT_IN/PTT_OUT.  There are also holes to mount two 10 pin headers, one
> of which provides the seven open-collector outputs and related signals,
> while the other provides additional copies of the PTT_IN and PTT_OUT
> signals (in simple parallel).
>
> I'm planning to do a single run of bare boards and am willing to make it
> a group purchase.  If you're interested, contact me off-list (if you
> already got in touch with me, no need to do so again).  I'd like to get
> the order placed in the next week or so.
>
> And if anyone sees errors in the wiring, layout, or concept, please let
> me know!
>
> John
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help:
> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/


 1375646153.0