Tachometer Speed Sensor

• Also known as MH Infrared Speed Sensor , speed encoder, optical encoder, speed counter.
• This is an easy to use sensor module you can use to sense the rotation speed of a rotary disk (used in geared DC motor), by looking at the rate of interruption of IR optical light between the photointerrupter sensor, in term of pulse frequency. You can equip this sensor under mobile robot that has rotary encoder disk to measure the speed of individual motor as a tachometer, so that you can improve the balance of speed between left and right motors. You can also use this sensor to sense thin sheet material such as papers, boards, etc.
• Indicator lights on when output high level and lights off when output low level.
• Applied to the corridor, bathroom, basement, warehouse, garage and other places’ automatic lighting, can also be applied to enterprises, hotels, shopping malls’ alarm system.
• With this IR transmitter, the Arduino project is able to transmit command to any IR remote Receiver if you have the right decoder.
• You may use simple digital reading to sense presence of sheet material, or pulse reading to read speed of encoder disk.
• You can use analog reading to sense the opaqueness of sheet material.

Product wiring instructions:

• VCC positive power supply 3.3-5V
• GND power supply negative
• Do TTL switching signal output
• Ao This module does not work