MOC7811 Slotted Opto Isolator Module Encoder Sensor IR Slot Type Optical Sensor 5V (MOC7811 Sensor)
The MOC7811 is a slotted opto isolator module designed for non contact object detection and position sensing. It consists of an infrared emitter and a phototransistor placed opposite each other inside a slot structure for reliable interruption based sensing.
Key Features -
- Integrated IR LED and phototransistor pair
- Slot type design for interruption detection
- Non contact object sensing operation
- Fast response suitable for encoder systems
- Compact module with mounting holes
- Compatible with microcontroller interfaces
Specifications -
- Operating voltage - approx 5V
- Input current - up to approx 50mA
- Output type - phototransistor switching output
- Slot width - approx 3mm
- Slot depth - approx 7mm
- Mounting hole spacing - approx 19mm
- Transistor output voltage - up to approx 30V
Applications -
- Rotary encoder and motor speed measurement
- Object detection and counting systems
- End stop and limit switch detection
- 3D printer and CNC position sensing
- Industrial automation and robotics
Pinout Configuration -
- Pin 1 - Cathode
- Pin 2 - Collector
- Pin 3 - Anode
- Pin 4 - Emitter
Working Principle -
The MOC7811 operates using an infrared emitter and receiver placed facing each other inside a slot. When no object is present IR light reaches the receiver and the output remains in one state. When an object interrupts the IR beam the light is blocked and the output changes state. This transition is used for detecting position speed and movement in electronic systems.
