Binary keypad front panel

John Wilson wilson at
Fri Mar 3 17:03:17 CST 2017

On Fri, Mar 03, 2017 at 03:11:21PM -0700, ben via cctalk wrote:
>Use a TELEPHONE keypad 0-7 OCTAL 8 and 9 binary. :)

I like it!  Or else make them dit and dah (like on a Morse keyer) so you
can have alphanumeric entry?  Eons ago a friend of mine wanted to design
an audio protocol (e.g. using a Votrax SC-01 and an ADC), figuring that the
word "ZERO!" has a lot more of a high-frequency component so it wouldn't
take much processing (this was in 8-bit days) to distinguish it from "ONE!".
The snag was that he wanted to add "WHAT?" as an error-correction feature.

John Wilson
D Bit

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