VS1838B Infrared Receiver Module – 38kHz

The VS1838B Infrared Receiver Module is a miniaturized, high-performance 38kHz IR receiver designed for decoding infrared signals from remote controls in DIY electronics projects. Featuring a high-speed PIN photodiode, a low-power preamplifier IC, and a full-wave band amplifier, it offers excellent sensitivity and robust ambient light rejection (up to 500 lux), making it reliable in varied lighting conditions. Operating at 2.7–5.5V DC (≤1.5mA), the module has three pins: VCC (power), GND (ground), and OUT (signal, active-low digital output). It supports standard IR protocols (e.g., NEC, RC5) with a center frequency of 37.9kHz ±1kHz and a reception distance of up to 18m (line-of-sight, dependent on remote strength). The module’s wide reception angle (±45°) ensures flexible positioning, ideal for applications like TV remotes, air conditioner controls, or custom universal remotes. Its compact design (7mm x 6mm x 5.4mm, 2.54mm lead pitch) and through-hole mounting suit breadboards, PCBs, or embedded systems like Arduino, Raspberry Pi, and ESP32. For Arduino, connect OUT to a digital pin (e.g., D2) and use libraries like IRremote to decode signals (e.g., IRrecv irrecv(2);). The module’s epoxy package includes a metal shield for strong electromagnetic interference resistance, ensuring stable performance in noisy environments. This RoHS-compliant sensor is perfect for home automation, remote-controlled robotics, and educational projects, integrating seamlessly with components like a 16×2 LCD to display IR codes or a NEMA 17 motor for remote-triggered motion. Note: The VS1838B outputs raw modulated signals; decoding requires software or a microcontroller. For best results, avoid strong IR sources (e.g., sunlight, fluorescent lamps) and pair with a 100nF capacitor across VCC/GND to filter noise.