Speed Sensor Module / Counter Module / Motor Test Module / Slotted Optocoupler Module

Pin Definition (4-Pin):

• VCC: Power Supply Positive
• GND: Power Supply Negative
• DO: Digital Output
• AO: (Invalid / Not Used)

Applications:
Widely used for motor speed detection, pulse counting, position limiting, etc.

Module Features:

1. Uses an imported slotted optocoupler sensor.
2. Slot width: 5mm.
3. Equipped with an output status indicator LED: LED OFF when output is High Level; LED ON when output is Low Level.
4. Output Logic: High Level when blocked (object in slot); Low Level when not blocked.
5. Comparator output provides a clean signal with good waveform and strong drive capability (exceeding 15mA).
6. Operating voltage: 3.3V - 5V.
7. Output form: Digital switch output (0 and 1).
8. Comes with fixing bolt holes for easy installation.
9. Small board PCB dimensions: 3.2cm x 1.4cm.
10. Uses a wide-voltage LM393 comparator.

Module Instructions:

1. Operation: When the slot is not blocked, the receiver tube conducts, and the module DO outputs a Low Level. When the slot is blocked, the DO outputs a High Level.
2. Interfacing: The DO pin can be connected to a relay module to create functions like limit switches, or connected to an active buzzer module to form an alarm.