Reaction Timer

Contributors: Nate

Pages

Push It!

Mental chronometry is the study of how fast humans react to different inputs. It takes a few hundred milliseconds for the signal to get from your eyes, to your brain, out to your limbs to respond. The reaction timer is a great project to demonstrate this time delay. It also makes for a fun game between friends!

alt text

It took 178ms to hit the button!

The principal of the reaction timer is simple: when the user sees the light turn on, press the button! A microcontroller is perfect for this because it can time milliseconds very accurately.

Required Materials

Here’s a list of parts used in this project:

Wishlist to all of these parts

Suggested Reading

This tutorial assumes you know a few things about Arduino and serial communication. If you’re a bit rusty consider checking out these tutorials:


Want more information about SparkFun's classes? Interested in getting involved with teaching electronics? Just want to talk? Sign up for our newsletter, or contact our education department.

SparkFun is a company built around one core idea – sharing ingenuity. We think everyone should have the hardware and resources to learn and play with cool electronic gadgetry.

Share, give, learn, SparkFun.

Do you regularly instruct classes and workshops in a formal or informal learning environment? SparkFun offers Educator Discounts to people teaching and sharing electronics.

Find out more.