In this tutorial I combine three previous videos and write some code to create an Arduino based Reaction Timer. The entire circuit is built on a breadboard using an ATmega328P on its own, which is combined with a Newhaven Display LCD Module that has an RGB backlight. I work through the code in some detail and explain how to write the code for the reaction timer. At the end of the video I provide links to the previous videos that show how to build the three individual circuits: Breadboard PSU, Arduino on a Breadboard and Arduino LCD Tutorial.

The Code

The code for this application is at (Please note it was developed on a 2011 version of the Arduino development environment, so changes to the libraries may introduce errors):