how to make a keypad

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This topic has 2 replies, 3 voices, and was last updated 8 years, 7 months ago by Ashutosh Bhatt.

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January 31, 2011 at 10:13 am #579

Kigongo
Participant

sir my project is digital door lock system… i want to make a keypad which have 0-9 digitals an one k button on it plz need you guidance

January 31, 2018 at 1:13 pm #14705

GANEEV SINGH
Participant

Hi

These links might help you:

1. https://www.engineersgarage.com/contribution/keypad-locking-system-with-user-defined-password

2. https://www.engineersgarage.com/8051/tags/8051?page=9&ui=default

3. https://www.engineersgarage.com/contribution/sleeping-security-smart-keypad-lock-using-atmega16

January 31, 2018 at 5:48 pm #14706

Ashutosh Bhatt
Participant

its very simple to make

just make row-column (matrix) connection like 4×3 or 3×4
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