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.

This ROS node handles communication between a ROS-based system and an Arduino connected via I2C. It processes input commands and relays information to the Arduino for display on connected devices.

Keypad phones, believe it or not, are still in use, and there is a surprising amount of variety to choose from. Some of the phones include 4G connectivity, cameras, and are built to last. If you ...

Based on the Arduino Pro Micro, this hand-wired pad is unique in that a single press of any of its 16 keys can virtually “type” out multiple lines of text. In this case, it’s a capability ...

Ever wished your Arduino could send you an SMS alert when something important happens—like an intruder detected by your DIY security system, or a gas leak in your kitchen? With just an Arduino UNO R4 ...

This DIY Blind Stick is an innovative yet simple solution that is designed to help users detect obstacles in their path. Using an Arduino Nano, ultrasonic sensor, and buzzer, it can sense objects in ...

The LNL-CK lenel command keypad integrates a 32 backlit LCD display with a 16 position keypad and reader port. The command keypad serves as a command reader - a reader from which user commands can be ...

Need to know how to type letters on a keypad, so you can dial a phone number with letters in it? Here's how to dial letters on an iPhone. We see them all the time—phone numbers with letters in them.