SKU: SENS-1947
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Generic 38kHz IR Transmitter Sensor Module - PCB Module

₹53.00 (Inclusive of all taxes)
Out of Stock

This 38kHz IR transmitter module generates a modulated infrared signal for remote control and optical switching applications, compatible with 3.3V/5V logic systems like Arduino, ESP32, and Raspberry Pi.

Features

  • Generates a 38kHz modulated infrared carrier signal for reliable transmission.
  • Low forward voltage operation (1.1V–1.5V) with a typical 20mA drive current.
  • Compact PCB module format for easy integration into DIY electronics and prototyping.
  • Designed for compatibility with common microcontroller platforms (Arduino, ESP32, Raspberry Pi).
  • Utilizes a gallium arsenide (GaAs) based infrared LED for efficient near-IR emission.

Out of stock

Description

This infrared transmitter module is built around a gallium arsenide (GaAs) or aluminum gallium arsenide (GaAlAs) infrared light-emitting diode (IR LED) that converts electrical energy directly into near-infrared light. The integrated circuitry modulates the output at a standard 38kHz frequency, which is essential for avoiding interference from ambient light and is the de facto carrier frequency for most consumer remote control protocols.

The module is supplied as a ready-to-use PCB with clearly labeled pins for power, ground, and signal input, simplifying integration into sensor arrays, remote control systems, and optical isolation circuits. Its construction ensures stable operation within specified electrical parameters.

Key Features

  • Standard 38kHz modulation frequency for compatibility with IR receiver ICs (e.g., TSOP382xx).
  • Optimized forward voltage and current specifications for direct microcontroller GPIO drive.
  • Compact and lightweight PCB module with a durable solder mask finish.
  • Simple three-pin interface (VCC, GND, SIG) for straightforward system integration.
  • High-efficiency IR LED provides strong near-infrared output for reliable signal transmission.

Applications

  • DIY infrared remote control transmitters for home automation.
  • Optical object detection and proximity sensing in robotics.
  • Signal transmission for IR-based data communication links.
  • Testing and development with IR receiver modules (e.g., TSOP series).
  • Educational projects demonstrating infrared light and modulation principles.

Technical Specifications

Model / Name38kHz IR Transmit Sensor Module
Modulation Frequency38 kHz
Output TypeModulated Infrared Light
Forward Voltage (VF)1.1 – 1.5 V
Forward Current (IF)20 mA (Typical)
Interface3-pin (VCC, GND, Signal)
Primary MaterialPCB
IR LED TypeGallium Arsenide (GaAs)

Frequently Asked Questions

What is the purpose of the 38kHz modulation on this IR transmitter?

The 38kHz modulation is a standard carrier frequency used to distinguish the transmitted IR signal from ambient infrared light (e.g., sunlight, incandescent bulbs). This allows compatible IR receivers (like the TSOP382xx series) to filter out noise and only detect the intended pulsed signal, ensuring reliable operation for remote controls and data links.

Can I drive this module directly from a microcontroller GPIO pin?

Yes, the module is designed for direct drive from a standard 3.3V or 5V microcontroller GPIO pin. Its specified forward voltage is 1.1-1.5V, and it draws approximately 20mA, which is within the current sourcing capability of most MCU pins. For extended duty cycles or multiple modules, consider using a transistor driver.

What is the typical transmission range of this module?

The effective range depends on the IR LED's output power, the driving current, and the receiver's sensitivity. Under typical conditions with a clear line of sight and the recommended 20mA drive, it can reliably communicate over several meters. For longer ranges, focusing lenses or higher drive currents (with appropriate heat sinking) can be used.

Package Includes

  • 1 x 38kHz Infrared Transmit Sensor Module

Additional Information

Weight 0.03 kg
Dimensions 2 × 5 × 1 cm