> Are there any commercial solutions out there?

It looks like the Genovation CP24 would be one commercial solution.
It is programmable ~100 bytes per macro and if one of the keys is
dedicated as a toggle the user can program up to 46 macros (24 normal,
24 alternate or shifted).  Note: the software provides for more than
one shift/toggle key but the keypad has only one LED indicator which
would make it difficult to handle more than two levels of macros with
a toggle - of course more than two levels are available without any
ambiguity using "shift" keys.

The CP24 is available in multiple versions - a serial version that
could probably be connected directly to the K3 for stand alone use
(without computer logging software) and a USB version that could be
used (with port splitting software) in a computer with a logging
program.

73,

   ... Joe, W4TV


On 2015-02-15 7:00 PM, Chris Hallinan wrote:
I am also interested in your design.
Are there any commercial solutions out there?

Thanks,

Chris

On Sun, Feb 15, 2015 at 1:44 PM, brian <[email protected]> wrote:
N2TK suggested that I post this.

If anybody wants to try HBing an external "button box" for the K3, I have a
16 button design which uses a $5 PIC.
Sits next to my keyboard.

It connects to the K3 via serial port to the station computer.   K3 port
sharing software is required.  Some free software products work.

Glad to send schematic , pix of final product and some notes.

No doubt a professional could create a better product but it works for me
OK.

73 de Brian/K3KO
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