Keypad to BS2
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Posts: 46,084
Hello,
How can I interface a 12-button keypad (four rows, three columns)
to a BS2? I need it to act like an alarm. You pre-program the Stamp
with your four digit code, and when you punch in the correct code,
the Stamp will activate a relay. Thanks for any help.
How can I interface a 12-button keypad (four rows, three columns)
to a BS2? I need it to act like an alarm. You pre-program the Stamp
with your four digit code, and when you punch in the correct code,
the Stamp will activate a relay. Thanks for any help.
Comments
sjohns10@h... writes:
> How can I interface a 12-button keypad (four rows, three columns)
> to a BS2? I need it to act like an alarm. You pre-program the Stamp
> with your four digit code, and when you punch in the correct code,
>
You can download my July Nuts & Volts article ("Stamp Applications") from
www.nutsvolts.com. It shows how to scan a 4x4 matrix -- something you can
easily adapt to 4x3.
-- Jon Williams
-- Dallas, tx
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