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 ...

This Arduino code is intended for use with an Adafruit Trinket M0 and six key switches. The key switches should be arranged in three rows and two columns. The keys should be wired to the five IO pins ...

This Arduino project provides a simple menu system for controlling the brightness of LEDs using button inputs. It utilizes an Arduino Uno and a keypad shield for user interaction. Relevant information ...

[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made out of scrap ...