74LS95N. Code to couple an Arduino with 74LS95N Serial to Parallel Multiplexer IC. This is useful to get more input pins, as we have a limited number of IO pins on the Arduino.
7 Segment. Complete code, written from scratch to run a run a 7-segment display using Arduino. It can display all Hexa-decimal numerals 0-F. Can be clubbed with 74LS95N to get more displays running, with just 3 IO pins.
Auth pass btn arr motors. Controls a digital security door. When the correct password is entered through a parallel key-pad, the motors rotate in one direction and pause for a while. Then an equal number of turns in the opposite direction. Also have a few LED pins, to act as indicators of door opening or closing.
Keypad. Code to control a parallel keypad, using the Arduino.
Keypad 7 segment. Code to control keypad and 7 segment display at-once. The key you press on the keypad is echoed on the 7-segment display.
Keypad binary LED. Displays the binary equivalent of the number on the keypad pressed, using a set of 4 LED's.
Pass led motors. Similar to Auth pass btn arr motors, but slightly different implementation
Mar14 / Blink Without Delay. A simple LED blink program
Mar14 / Digital Read Serial. Interfacing the Arduino with a digital computer. The Arduino just echoes the input from a sensor to the USB port of a digital computer.