A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when ...
The Keypad is a library for using matrix style keypads with the Arduino. As of version 3.0, it now supports multiple keypresses. This library is based upon the Keypad Tutorial. It was created to ...
An Arduino project implementing a security alarm system featuring PIN code access via a 4x4 keypad, status updates on a 16x2 LCD, motion detection using an HC-SR04 ultrasonic sensor, and ...
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