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Picture of LED Reaction Timer
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This project is an updated version of the original reaction timer project described in Len Buckwalter's "Electronic Games & Toys You Can Build" book. The incandescent bulbs and passive components are replaced by a microcontroller and LEDs.

Step 1: The Original Reaction Timer

Picture of The Original Reaction Timer
This is the original reaction timer game. The purpose of the game is to see who has the fastest reaction time. A golf ball is placed at the top of the rail and allowed to roll downhill until it hits a stop. The first person to press his button AFTER the ball hits the stop is the winner. If a player presses his button before the ball reaches the end, he loses.
 
Mashb4 years ago
Hi. Below the picture you have written that if there are considerable amount of interests then you would also post the schematic and source code. Well, I am very interested as it would help me vastly. So, if it's possible can you plzzz post the schematic and source code as well??? Thank you.
only_shormi4 years ago
I am really interested about this project, can u plz kindly post the schematic and source code plz,
raykholo6 years ago
cant u just drop a ruler and see how long it takes to catch it?
This is just the sort of middle school electronics/robotics project us tech teachers love - please do post a schematic and code!!!
Please do attach the program, I would very much like to see it.
dickda7 years ago
Yes, please do post the program. This looks like something that I can use in my high school physics class to demonstrate reaction times.