I want to meassure the speed of a little model car, so i wrote a Programm (Picture is attached) which reads the output from my arduino and plots the values.
First i wanted to use LDR´s but they are to slow. Now I want to use photodiodes, but i dont know how to use. In the Arduino Playground i spotted that you can use them like LDR´s but before i order them i rather ask if its right. And are this Photodiodes good for me: http://tinyurl.com/d7p48y5
Can I built this (and will it work
). Picture is attached.
P.S.: Sry for my very bad english, im from germany