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!
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.
Here’s a list of parts used in this project:
- Big Dome Push Button - Red
- OpenSegment Serial Display - 20mm (Blue)
- JST 3 Wire Assembly
- Enclosure - Flanged (Red)
- 5V Wall Adapter
This tutorial assumes you know a few things about Arduino and serial communication. If you’re a bit rusty consider checking out these tutorials: