[GreenKeys] Interface board

[Til128 at aol.com]

Hi all:
 
I (thanks to a "push" from Jack Hart and Larry Tigue, and info
from Jeff  Angus and Jim Haynes) have come up with a VERY simple
RO TTY loop converter  using 1 resistor, 2 diodes and the HSR312L
IC chip.
 
This will be a completed PC board ready for hook-up to your loop
and  your RS232. (4 connections.)
 
For those who are wondering, The HSR312L employs an active
current limit  circuitry enabling the device to withstand current
surge transients.
 
Each PC board is 1 X 1 5/16. (Fits in a relay case if you  so
desire.)
 
I have to charge $20 each to cover expenses. This INCLUDES
postage  anywhere in the lower 48.
 
If you would like a picture or the schematic please e-mail me off
list  at TIL128 at aol.com
 
OR better yet, if you want to be the first in your neighborhood
to own  one of these little beauties, let me know and I'll get the
solder fairies  working overtime to zip 'em out to you.
 
I will be away today (Thurs.) but will return Friday. 
 
73, 
DE: Tom Tillson 
All Things Electromechanical. 
ITTY  
GREENKEYS
HEAVYMETAL 
LL TTY 
NNNN
 

Thomas Tillson 
1 Abbey Road 
Hyde Park, 
NY  
12538
**************Great Deals on Dell Laptops. Starting at $499. 
(http://pr.atwola.com/promoclk/100000075x1217883258x1201191827/aol?redir=http://ad.doubleclick.
net/clk;211531132;33070124;e)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.qth.net/pipermail/greenkeys/attachments/20090205/47522395/attachment.html