Re: HEX Keypad #Homebrew

David Madole

Your arrangement is the same as the Netronics. The Quest Super Elf has the rows in the opposite order, the zero is at the top. It wasn’t all that standardized even when using that chip :)





From: <> On Behalf Of Timothy Stoddard
Sent: Sunday, March 24, 2019 8:06 AM
Subject: Re: [cosmacelf] HEX Keypad #Homebrew #ThisGroup


Layout is actually old-school... it's the layout used from all of the early variations of the 'COSMAC 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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