TSOP 1738 Infrared Sensor

TSOP 1738 Infrared Sensor is a highly reliable and widely used infrared (IR) receiver module designed to detect and decode 38 kHz modulated IR signals. Engineered for excellent noise immunity and stable performance, this compact sensor is ideal for remote control systems, home automation, consumer electronics, robotics, and embedded applications.

Built with an integrated photodiode, automatic gain control (AGC), band-pass filter, and demodulator, the TSOP1738 provides a clean digital output that can be easily interfaced with microcontrollers such as Arduino, Raspberry Pi, PIC, AVR, and ARM-based systems. Its ability to reject ambient light interference from sunlight, fluorescent lamps, and other sources makes it a trusted choice for both commercial and DIY electronics projects.

Key Features of TSOP1738 Infrared Sensor

• 38 kHz Carrier Frequency
  Optimized to receive standard 38 kHz IR remote control signals used in TVs, air conditioners, and audio systems.

• High Noise Immunity
  Built-in AGC and band-pass filter suppress interference from ambient light and electrical noise.

• Digital Output Signal
  Provides a clean, TTL/CMOS-compatible output for easy microcontroller interfacing.

• Low Power Consumption
  Ideal for battery-operated and energy-efficient applications.

• Wide Operating Voltage Range
  Operates reliably with common logic supply voltages.

• Compact & Lightweight Package
  Small form factor allows easy integration into space-constrained designs.

• Reliable & Durable Design
  Proven performance in consumer electronics and industrial automation products.

Technical Specifications – TSOP1738

• Sensor Type: Infrared Receiver Module

• Model Number: TSOP1738

• Carrier Frequency: 38 kHz

• Operating Voltage: 2.7 V to 5.5 V

• Supply Current: Typically ~0.4 mA

• Output Type: Active LOW digital output

• Reception Angle: ±45°

• Peak Wavelength: ~940 nm

• Transmission Distance: Up to 10 m (depending on IR source and environment)

• Package Type: 3-pin epoxy package

• Operating Temperature: –25 °C to +85 °C

• Pin Configuration: Vcc, GND, OUT

Note: Actual performance may vary depending on IR transmitter power and environmental conditions.

How the TSOP1738 Infrared Sensor Works

The TSOP1738 IR sensor detects infrared signals that are modulated at 38 kHz, which helps eliminate false triggering caused by ambient light sources. The incoming IR signal is filtered, amplified, and demodulated internally, providing a stable digital output. When a valid IR signal is detected, the output pin goes LOW, making it easy to decode remote control protocols such as NEC, RC5, and Sony using software libraries.

Applications of TSOP1738 Infrared Sensor

Thanks to its reliability and ease of integration, the TSOP1738 is used in a wide range of applications, including:

• IR Remote Control Receivers
  Used in televisions, set-top boxes, DVD players, air conditioners, and audio systems.

• Home Automation Systems
  Enables IR-based control of lights, fans, and appliances using remote controls.

• Microcontroller & Arduino Projects
  Ideal for learning and prototyping IR communication and remote decoding.

• Robotics & Embedded Systems
  Used for wireless command reception in robots and autonomous systems.

• Consumer Electronics
  Integrated into appliances requiring infrared communication.

• Educational & DIY Electronics Kits
  Popular choice for students, hobbyists, and electronics training labs.

Why Choose the TSOP1738 Infrared Sensor?

The TSOP1738 stands out for its stable performance, strong noise rejection, and industry-standard 38 kHz frequency support. Its low power consumption and compact design make it perfect for both commercial products and hobbyist projects. With easy interfacing and broad compatibility, it significantly reduces development time and ensures dependable IR signal detection.

Whether you are building a remote-controlled system, smart home project, or embedded electronics application, the TSOP1738 Infrared Sensor delivers consistent, accurate, and efficient performance.

Package Includes:

1 x TSOP 1738 Infrared Sensor

FAQ

1. Where can we buy this TSOP 1738 Infrared Sensor?

This product is available online https://aiiottech.in/product/tsop-1738-infrared-sensor/ and also available at our store in Pudupakkam/Kelambakkam, Chennai-603103

2. When can I get this TSOP 1738 Infrared Sensor after placing the order?

RGRJ AIIoT TECHNOLOGIES will immediately ship and deliver the product within 1-3 working days.

Video Link: TSOP 1738 IR sensor