CNY70 Reflective Optical Sensor / Infrared emitter and Phototransistor with Isolated Transistor Output

The CNY70 is an optical reflective sensor commonly used in various electronic projects. It consists of an infrared emitter and a phototransistor housed together in a single package. This sensor is designed to detect the presence of an object or to measure the distance from a surface based on the reflection of infrared light.

Key Features:

1. Infrared Emitter and Phototransistor: The CNY70 contains both an IR LED (infrared emitter) and a phototransistor, making it capable of detecting reflected infrared light.
2. Reflective Sensing: It is primarily used for reflective sensing, meaning it can detect objects or surfaces that reflect the emitted IR light back to the phototransistor.
3. Compact Size: Its small size makes it suitable for integration into various applications without taking up much space.

Applications:

• Line Following Robots: Used to detect lines on a surface for navigation.
• Object Detection: Can be used in automation systems to detect the presence or absence of objects.
• Proximity Sensing: Measures distance to an object based on the intensity of the reflected light.
• Position Encoding: In rotary or linear encoders to determine position by detecting markings on a rotating disk or linear strip.

Specifications:

• Operating Voltage: Typically around 5V, but can vary.
• Sensing Distance: Effective in a short range, usually a few millimeters.
• Output Type: Analog or digital signal depending on the configuration and usage.

Circuit Integration:

To use the CNY70 in a circuit, you typically connect the IR emitter to a power source through a current-limiting resistor. The phototransistor side is connected to a voltage divider to convert the detected light into a voltage signal that can be read by a microcontroller or other processing unit.