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ICOM IC-706MKIIG
DIRECT ENTRY KEYPAD

A useful and fun project, from :  QST Dec 1999 p38-39
information about the project can be obtained from the author,  John W2FS

This project allows direct keypad frequency entry into the Icom, as well as some other useful functions.
As well, I upgraded the project with a CI-V interface.
This allows serial input from a computer,
which controls the radio from one of the many programs available...

here is a look at the project:

top keypad
keypad


serial input and selector switch
serial


inside view of microcontroller and CI-V modules
inside


My homebrew keypad, designed with EAGLE CAD
software, iron transferred from laser printed acetate
onto copper board and etched with ferric chloride.
The top silkscreen is transferred the same way,
after the holes are drilled (to allow alignment).
keypad


the keypad schematic:
sch

CI-V interface:
ci-v