Wireless Remote Control Module (TSOP4838 – 38kHz)

The TSOP4838 is a miniaturized Infrared (IR) receiver module engineered specifically for Pulse Code Modulation (PCM) remote control systems. Operating at a standard carrier frequency of 38 kHz, it integrates a PIN photodiode and a preamplifier into a single package. This enables it to receive, demodulate, and filter signals from common consumer electronic remotes. Core Technical Specifications: Carrier Frequency: 38 kHz Operating Voltage: 2.5 V to 5.5 V DC Supply Current: 0.5 mA to 0.9 mA (very low power requirements) Transmission Distance: Up to 45 meters (148 feet) under ideal conditions Peak Sensitivity Wavelength: 950 nm Directivity Angle: 45 degrees Package Form Factor: DIP-3 (through-hole component) Pin Configuration (DIP-3 Package): Looking at the front of the sensor (the side with the bulbous detector lens), the pins from left to right are typically arranged as follows: OUT (Pin 1): Demodulated data output. Connects directly to a microcontroller digital input pin. GND (Pin 2): Ground connection (0V). Vs (Pin 3): Power supply pin. Key Performance Strengths: Noise Suppression: Built-in automatic gain control (AGC) suppresses spurious pulses caused by energy-saving lamps like Compact Fluorescents (CFLs). EMI Shielding: Internal metal shielding protects the data string from electromagnetic interference. Ambient Light Resistance: Package features an epoxy daylight filter to ensure sunlight or room lighting does not disrupt signal reception. Burst Detection Design: Optimized exclusively for receiving brief bursts of data separated by gaps (like remote buttons) rather than handling continuous 38 kHz data streams. Common Applications: Interfacing with microcontrollers such as Arduino and Raspberry Pi boards. DIY home automation, smart lighting switches, and robotics. Replacement parts for consumer entertainment systems like televisions, stereos, and media players.