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Forum Index : Microcontroller and PC projects : 4x5 Matrix Keypad

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KRZ3
Newbie

Joined: 31/12/2014
Location: United States
Posts: 38

Posted: 02:07am 21 May 2015

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I want to use a 4x5 matrix keypad for a project and I was wondering if there is a way to expand the keypad command to interface this? Thanks! Edited by KRZ3 2015-05-22

viscomjim
Guru

Joined: 08/01/2014
Location: United States
Posts: 925

Posted: 06:16am 21 May 2015

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I wonder if you could use a I2C port expander to do this. Unfortunately you would need more that 8 bits. Not aware of being able to use the built in command to go more that 4 x 4. Maybe one of the Cfuntioneer gurus would be able to implement a matrix keyboard function with variable rows and columns.

KRZ3
Newbie

Joined: 31/12/2014
Location: United States
Posts: 38

Posted: 06:25am 21 May 2015

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Yeah, I figured it wouldn't be possible. Is there a way to see the code and edit it for a 4x5 matrix? Any Cfunction gurus out there want to tackle it? I would think this would be useful to several people. Unfortunately my skills are limited.

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