3×4 Matrix keypad connected to an arduino. Displaying results of key pressed on a 7 segment led display via 74HC595 shift register which reduces the required pins of the 7seg display from 8 to 3.
Here is a shield for Arduino that makes adding quality sound to your products easy. It can play up to 22KHz, 12bit uncompressed audio files of any length.
The LCD Button Shield from Sparkfun Electronics provides a 16×2 LCD screens along with a keypad consisting of 5 keys — select, up, right, down and left. With this shield you will be able to move through menus and make selections straight from one board attached to your Arduino without requiring a massive tower of shields.
Added a second joystick to the shield and use one for forward/back motion and the other for turning. I find this setup gives better control.
This shield provides the necessary connections between the joystick and the Arduino so that it can read the joysticks X, Y and Switch readings on it’s analog inputs. I chose to mount the joystick on it’s own proto shield instead of mounting it to the prototype area of my XBee shield.
Video explaining what multiplexing is, why we do it and how it is done. Covers using the Arduino to handle the multiplexing and using a 7219. Using the 7219 we can control up to 8 seven segment displays while using only 3 pins from the Arduino. The 7219 also handles all refreshing of the display […]