[1000mp] FSK interface using opto-isolators

[Art Searle W2NRA]

Hi John,

Go to www.microHam.com and look at their microKeyer.  I use it and it works 
great for CW and RTTY.  They also claim isolation of all IOs.

73,
Art
W2NRA

----- Original Message ----- 
From: "Vermilyea, John" <JVermilyea at princetoninstruments.com>
To: <1000mp at mailman.qth.net>
Sent: Thursday, December 02, 2004 23:30
Subject: [1000mp] FSK interface using opto-isolators





Hi Group,

Is it possible to use opto-isolators to generate both the Shift and PTT 
using the computer serial Com port? If so, what would the value be for the 
resistor be to operate the LED? More important, does the serial port have 
enough current to drive an opto-isolator? I plan to operate RTTY using 
FT1000 Mk5 Field and opto-isolators would completely eliminate any ground 
loops.

 Thank you,
John V.




_______________________________________________
1000mp mailing list
1000mp at mailman.qth.net
http://mailman.qth.net/mailman/listinfo/1000mp