The TSOP IR Receiver (Product Code: SM019) is a miniaturized sensor designed to receive infrared (IR) signals from remote control systems. It is widely used in electronic projects involving wireless communication, remote-controlled appliances, and DIY home automation systems.

Features:

• Integrated IR Sensor: Built-in PIN diode and preamplifier.

• High Sensitivity: Capable of detecting IR signals even under ambient light conditions.

• Modulation Support: Supports modulated IR signals (typically 38 kHz, used by most remotes).

• Digital Output: Clean, TTL-compatible output that goes LOW when IR signal is detected.

• Wide Compatibility: Easily works with Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers.

• Compact Size: Ideal for space-constrained applications.

• Noise Immunity: High immunity against ambient light and electrical noise.

• Built-in Demodulator: Directly outputs decoded signals, simplifying circuit design.

Technical Highlights:

• Operating voltage: 2.5V to 5.5V

• Operating frequency: Typically 38 kHz

• Output signal: Active LOW digital output

• Viewing angle: Approximately ±45 degrees

• Detection range: Up to 10 meters under optimal conditions

• Interface: 3 pins – VCC, GND, and OUT

Pin Configuration:

• OUT (Signal Output): Connects to a digital input pin of a microcontroller.

• GND: Ground connection.

• VCC: Power supply input (usually 5V).

Working Principle:

The TSOP module detects modulated infrared signals transmitted by a remote control. Internally, it filters and amplifies the signal, demodulates it, and then produces a clean digital output. When a valid IR pulse is received, the output pin goes LOW. This signal can then be interpreted by a microcontroller to perform specific actions.

Applications:

• Consumer electronics such as TVs, audio systems, and set-top boxes.

• Robotics projects involving wireless remote control.

• Arduino-based DIY home automation systems.

• IR-controlled lighting and appliance switches.

• Security and monitoring systems with remote triggers.

• Remote-controlled toys and interactive devices.

Advantages:

• Eliminates the need for external IR signal processing circuitry.

• Consistent and reliable output even in noisy or brightly lit environments.

• Simple 3-pin connection makes it easy to interface.

• Recognizes signals from standard IR remotes without additional components.

• Suitable for educational, commercial, and hobby electronics projects.

Important Notes:

• This sensor is designed for modulated IR signals. It will not respond to continuous, unmodulated IR light.

• Ensure that the IR remote control being used transmits at a frequency close to 38 kHz, which is the standard for this module.

• Performance may vary slightly depending on ambient lighting and presence of reflective surfaces.