This Arduino project uses a 4x4 keypad and an I2C LCD display to create a simple calculator. It supports basic operations like addition, subtraction, multiplication, and division. Users input numbers ...

This Arduino code implements a password entry system using a 4x4 keypad and a 16x2 I2C LCD display. Users enter a numeric password, which is then validated against a predefined password. If correct, ...

LCD, Keypad, Enclosure Expansion Arduino Shield (video) 9:57 am March 6, 2015 By Julian Horsey. ... • LCD/display: Most projects require some way to tell the user what’s going on.

Makers, hobbyists and electronic enthusiasts searching for a project to keep them busy this weekend may be interested in a new DIY custom mechanical keypad complete with TFT LCD display, which has ...

This Arduino BASIC interpreter will make a really fun one-day project if you’ve already got the parts on hand. [Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, … ...

The most popular display system widely used in Arduino projects is the liquid crystal display (LCD). LCD displays consists primarily of two sheets of polarized glass plates with a thin layer of liquid ...

The SocialBot9000, as [Chris] calls his build, is an Arduino Uno connected to an Ethernet shield and an LCD character display. The firmware uses the Twitter API to search for recent posts ...