[GreenKeys] RS-232 to TTL converters.

[epvgk at limpoc.com]

On Thu, Jul 04, 2013 at 05:46:34PM -0500, Jeffrey D Angus wrote:
> <http://www.ebay.com/itm/280926193210>
> 
> $14.24 for five including shipping.
> How can you go wrong with that? I can't even buy just the IC
> and a 9 pin connector for that.
> 
> Earlier, there was mention of some HM312 (I think) Mosfet
> optocouplers for talking to the loop circuits. Apparently these
> are no longer available, but I did find some Toshiba TPL227GA
> couplers at Mouser.com. 400 Volts @ 120 mA.
> <http://www.mouser.com/ProductDetail/Toshiba/TLP227GAF/?qs=sGAEpiMZZMugPZL2oX39yEcVQVNs6Y3G3hmjo6koHxU%3d>
> 

there's a list of some others i found here: 
http://heepy.net/mediawiki/index.php/Optocouplers_for_teletype_current_loop

> I know I can use some 4N25 or similar optocouplers on the
> loop side for keying sense.
> 
> I _know_ if I bought this stuff, the Black Box converters I can't
> find in the shop will magically appear now. ;-)
> 
> Jeff-1.0
> wa6fwi
> 
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