Optical Speed Sensor Module

The main purpose of this module is to monitor the speed of the motor.

Widely used in motor speed detection, pulse counting, position limit, etc.

Can be used with a microcontroller such as an Arduino for motor speed detection, pulse counting, position limit, etc. In principle, every speedometer simply measures the speed at which an event occurs.

This is usually done by counting the events for a certain period of time (integration interval) and then simply dividing the number of events by the time to get the speed.

This is an easy module to work with. Physical interruption of the visual path of the optical sensor by some kind of slotted wheel or similar mechanism (an optical sensor usually consists of a light-emitting diode that provides illumination, and a phototransistor that detects the presence or absence of that illumination).

The optical sensor used here consists of an infrared light-emitting diode and a phototransistor. This prevents interference from stray external light sources and, by tuning the two components to a specific radiation frequency, they are also immune to unwanted interference.

The DO output interface can be directly connected to an IO port of a microcontroller; if there is a block detection sensor, such as the speed of the motor encoder, it can be detected.

DO modules can be connected to the relay, the limit switch, and other functions; it can also be used with the active buzzer module to assemble an alarm.

Features:

Optical coupling sensor, width 5 mm;

Output status indicator:

If the output is high, the lights are off. If output is low, the lights are on. (If it is covered, it will produce a high level; otherwise, it will output a low level)
Equipped with a fixed mounting hole, easy to install!
Uses the LM393 wide voltage comparator
Specification:

Operating voltage (VDC): 3.3 to 5

Comparator: LM393

Output: Digital switch output (0 and 1)

Length (mm): 32

Width (mm): 14

Height (mm): 13

Weight (g): 2

Wiring Specification:

VCC Connect the positive 3.3–5 V power supply
GND Connect the power ground
DO TTL switch signal output:
AO This module does not work
Package includes:
1 x speed measurement sensor module