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 repository explores the interfacing of 4x4 keypad with an Arduino, but without using any built-in headers. The goal is to completely learn the interfacing mechanism from scratch. The code is ...

[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 ...

[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 ...

How to use compiler optimization options with the Arduino IDE. The goal of Arduino is to make microcontroller development as easy as possible so that the programmer can concentrate on his or her goals ...