> I can't tell you the optoisolator part numbers, but it worked
> very well for me.
The optoisolator(s) are PC123, the current limiting resistor is 1K.
It works fine with +/-5V logic but I have not had occasion to use it
with "low power" (+/- 3.3V) ports.
73,
... Joe, W4TV
On 2/23/2018 5:53 PM, Bob Burns W9BU wrote:
On 2/23/2018 2:49 PM, groupsrichart@gmail.com wrote:
I have tried two different interfaces using optoisolators to attempt
FSK and PTT keying from a serial card to the rear panel ACC2 connector.
I used an interface very similar to this one
(http://www.w3yy.com/fsk.htm) for a few years with my Icom IC-7600. It
worked very well when driven by a real RS-232 COM port on a desktop
computer. I can't tell you the optoisolator part numbers, but it worked
very well for me.
Bob...
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