The sensor for speed measurement for Arduino is mainly used in the engine speed detection, pulse count, the position limit, etc.
Features of speedometer for Arduino:
With imported groove coupling optical sensor width 5mm.
If the output of a high level, the lights are off; the lights are at low level.
If the module is covered, is the output of a high level, otherwise the output is of low level.
And good signal waveform, with a strong drive for more than 15mA.
Operating voltage of 3.3V and 5V.
Output: digital switching (0 and 1).
Equipped with a fixed bolt hole, easy to install.
PCB board size: 3.2 cm x 1.4 cm.
Use the LM393 wide voltage comparator.
The DO-output can be directly connected to a microcontroller IO port, if there is a block detection sensor, which can detect the speed of the motor-encoder. DO modules can be connected to the relay, limit switch and other functions, including the buzzer alarm.