This project uses an Arduino with a 4x4 keypad and an LCD to create a simple multiplication calculator game. The user is asked to solve a random multiplication problem, and the input is verified ...

This calculator uses a full 16 button matrix keypad. The Arduino deciphers button pushes with the help of the Keypad library, at which time the appropriate character is displayed on the 2×8 LCD ...

Walnut Case Sets This Custom Arduino-Powered RPN Calculator Apart From The Crowd. 12 Comments . by: Dan ... a custom PCB to connect the keypad to an Arduino and a 20×4 LCD display was ...

Keypad pin 4 to Arduino digital 8 //R4; Keypad pin 5 to Arduino digital 4 //C3; Keypad pin 6 to Arduino digital 7 //R3; Keypad pin 7 to Arduino digital 6 //R2; Since keypads are available from many ...

Featuring an Arduino Nano microcontroller board and the keyboard from a small numeric keypad the LCD display the calculator is powered by a set of AA batteries through a DC-to-DC converter.

This is the SB116, an 8-bit programmer’s calculator powered by an Arduino Nano. It features a 128 x 64 pixel monochrome OLED display and can be powered by either a USB port or three AAA batteries.