[GreenKeys] RS232 to TTY Loop Boards

[drlegendre .]

Lester,

He lists a current replacement for the obsolete opto right at the bottom of
the page..

"Update: July 23, 2012

The Fairchild HSR-312L opto-isolator used in the original design is now
obsolete. The Omron G3VM-401B is a pin-compatible replacement with better
specifications and has been successfuly used (by Steve Garrison) with this
board design."
The Omron part is $2.85/ea from Digi-Key - I just ordered a couple.


If you order up some boards, I might be interested in one. Let me know.

On Sun, Feb 15, 2015 at 4:32 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

>
> Attached is someone else's paper on optocouplers - I think some of those
> should be current production.  If they're all obsolete, well then we
> need to find something new.
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