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[DPRG] 1-wire keypad

Subject: [DPRG] 1-wire keypad
From: Larry Kerns larrykerns at mcleodusa.net
Date: Sat Jun 30 00:57:45 CDT 2001

I believe the circuit is located at:


Larry Kerns

"montgomery f. tidwell" wrote:

> Howdy,
> in my recent Web wanderings i came across a schematic for using a
> 3x4 or 4x4 keypad with only 1 wire. it used a specific combination
> of resistors.
> now that i need it, i can't seem to locate it again. can someone
> point me to a schematic that describes this?
>                              \\//_
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