[Elecraft] HB "button box" for K3

[Mike WA8BXN]

If I understand this concept properly, its something like this. You have a
box with multiple buttons on it. Each one sends a different macro string to
the K3. Some kind of processor would be needed. Have to build a box with
buttons on it and need serial output to go to the K3. 
 
If I wanted to prototype such a system, I would use a USB 10 digit keypad
(about $5, has at least 15 usable "buttons" on it) and a USB to serial cable
to go to the K3 (or KX3). For a processor, I would use a Raspberry Pi, which
supports 2 USB devices. I would write somewhat simple software that runs
when powered up that reads the characters coming from the keypad and sends
appropriate macro strings to the radio. 
 
An alternative way would perhaps use an arduino processor, a homebrew switch
matrix, and serial output to the radio. This would be a cheaper way but I
think a lot more work. 
Cool project! 
 
73 - Mike WA8BXN