Re: HEX Keypad #Homebrew

Timothy Stoddard

Layout is actually old-school... it's the layout used from all of the early variations of the 'COSMACĀ ELF'. Neutronics, Quest, Popular Electronics article all used this layout and is simply based on the encoder chip used: 74C922/3.
Tim Stoddard
"Life with technology: It's a roller coaster ride!"

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