[GreenKeys] Polar Relay

[Jim Haynes]

I ran across a wonderful device for the purpose of opto-isolating a TTY
loop.  It's Fairchild HSR312.


jhhaynes at earthlink dot net


On Wed, 17 Sep 2008, H.W.Hall wrote:

> Or try an opto isolator circuit.
> --Wayne
>  WB4OGM
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