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PICList Thread
'5x5 keypad decoder'
1998\03\23@104738 by Aaron Hickman

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To All,

   Can anyone suggest an IC that will decode a 5x5 keypad?

Much appreciated,

Aaron

1998\03\23@134955 by Gennady Palitsky

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>To All,
>
>    Can anyone suggest an IC that will decode a 5x5 keypad?
>
>Much appreciated,
>
>Aaron

If software doesn't bother you, any PIC with 10 (5 in, 5 out) dedicated pins
will work. Look at Microchip's AN529. I used same principle to decode 40
switches keypad. It's also cheaper than standard keyboard encoders like
National's 74C923 (which is 20-key only).
Best regards,

Gennady Palitsky
Jefferson Audio Video Systems
spam_OUTgennadypTakeThisOuTspammainlink.net

1998\03\23@145505 by Michael Hagberg

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ah, maybe a pic16C54 (if you want a serial output) or a pic16C55 if you want
parallel output.

michael


-----Original Message-----
From: Aaron Hickman <.....Aaron.HickmanKILLspamspam@spam@DREXEL.EDU>
To: PICLISTspamKILLspamMITVMA.MIT.EDU <.....PICLISTKILLspamspam.....MITVMA.MIT.EDU>
Date: Monday, March 23, 1998 9:50 AM
Subject: 5x5 keypad decoder


>To All,
>
>    Can anyone suggest an IC that will decode a 5x5 keypad?
>
>Much appreciated,
>
>Aaron
>

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