The Encoder speed sensor, composed of an IR LED and an IR Photodiode, functions as a Photo-Coupler or Opto-Coupler. It detects objects using infrared radiation and consists of LEDs for power and digital output indication. The digital output signal becomes HIGH when an object obstructs the sensor gap and LOW when there's no obstruction.

Features:

1. Operating Voltage: 3.3V to 5VDC: The sensor operates within a voltage range of 3.3V to 5VDC, making it compatible with various microcontroller platforms.
2. Slot Width: 5mm: The width of the sensing slot is 5mm, providing adequate space for detecting objects passing through the sensor.
3. Output Signal: Analog and Digital output: The sensor provides both analog and digital output signals, offering flexibility in interfacing with different types of microcontrollers or processing units.

Specifications:

• Operating Voltage: 3.3V to 5VDC
• Slot Width: 5mm
• Output Signal: Analog and Digital output
• PCB Dimension: 3.2cm x 1.4cm

Pinout:

• VCC: Connect to the positive 3.3V - 5V power supply
• GND: Ground
• DO: TTL switch signal output
• AO: Not Applicable

Video: In the provided video tutorial, an RPM Tachometer is demonstrated, showcasing how to measure the speed of a motor using Arduino, an OLED display, an optical sensor, a breadboard, and jumper wires.