DIY Alarm Panel using NodeMCU v3 ESP8266 for Home Assistant (Alarmo), using a 4x4 matrix keypad, RFID(RC522) and a MAX7219 7-Segment Dislpay

Verilog code for scanning a four by four matrix keypad.

Library code for upcoming RetroClash book

MicroPython library for interfacing with a keypad matrix

STM32 Touch Sensing Controller (TSC) enables the designer to simply add touch sensing functionality to any application.

Arduino library for 4x4 analog keypad

Convert text to keypad code and vice versa.

8x2 LCD display and 4x4 Keypad were connected over an Arduino. This is an Arduino program that verifies if a user entered the correct Pin. There are only 3 attempts after which will have to wait for 10 mins to re-enter the password.

Simple-to-use matrix keypad library.

Raspberry Pi Pico C library for controlling a 4x4 matrix keypad

Create your own macros without an arduino micro or leonardo, you will use python and an arduino nano, uno or mega

Arduino Real Time Clock with Alarm and environmental sensors

C Calculator written in a Tiva MCU to interface a Keypad and a LCD.

DIY hardware calculator on AVR MCU ATmega328P written in assembly from scratch

This implementation allows reading a 4x4 keypad without an external IC encoder (like the 74C922/23). It performs the same function as the IC, but in a simpler form. The module can be used in various projects, such as a calculator. A detailed explanation is provided in the README file.

Arduino - Sistema de alarme codificado com sensor de vibração SW-420

⌨️ Keyboard connected by a bluetoh module and LCD screen

Tic-Tac-Toe game with AI implemented on a Raspberry Pi Pico board and a 20x4 LED display.

MatrixKeypad 4x4

With this library, you can easily use your custom-designed keypads in your project. With T9 keyboard support, you will be able to write text on numeric keypads. You can use it as you wish in your Arduino projects. We can also contribute to the project and make it more advanced.