[Elecraft] K3 Button Box

[Doug Person via Elecraft]

This would be quite an interesting Arduino project.  You could use a 
couple of serial chips - one to receive from the computer, the other to 
transmit to the K3/KX3.  Normally incoming traffic is just redirected 
from input to output.  When a button is pushed, the macro is just passed 
to the output.  Add a 2x16 LCD display and you could manage groups of 
macros that you could scroll through.  Lots of possibilities for an 
interesting project.

73, Doug -- K0DXV