How detect speed using speed sensor and arduino

Development Boards Arduino
1

Hey, i need some help with the connection here. I wish to measure the speed of rotation of wheel using LM393 Comparator Speed Sensor Module. But I m not sure about the connection of the speed sensor to the Arduino Uno and the coding that should be used. Can anyone shows the connection? Your help is much appreciated

2

Can you post a link to the sensor module and/or its data sheet?

3

http://www.miniinthebox.com/lm393-compa … 85425.html

4

This Chinese web-shop seems to have the same one and shows the underside with pin out descriptions in the pictures. A digital and analog output on one side. What this means for a circuit is anybodies guess though:

http://www.dx.com/nl/p/lm393-comparator … mIgfLjqhBd

I’d say write a program that continously reads the analog and digital pin and prints it to serial to the pc. Then analyse the readings to see which one is pure digital ON/OFF HIGH/LOW. It’s probably just detecting the blockage of light in the black gate. It’s not reading speed directly. Only gives pulses at RPM rates if something interrupts the light with every revolution.