Description
🔹 433MHz 4-Channel RF Receiver Module – High Sensitivity & Stable Connection
Complete your wireless control setup with this high-performance 4-channel RF receiver. Designed as the perfect match for standard 433MHz transmitters, this module features exceptional signal sensitivity (-105dBM) and an adjustable tuning knob to filter out noise.
It is widely compatible with microcontrollers like Arduino, Raspberry Pi, and standalone relay systems, offering a reliable communication distance of up to 200 meters in open areas.
✅ Key Features
- ** Enhanced Sensitivity (-105dBm):** Superior decoding capability ensures that weak signals are received reliably, making it more robust than standard basic receivers.
- 🎛️ Adjustable Noise Filter: Features a green variable resistor (potentiometer) on the board, allowing you to manually tune the signal sensitivity to eliminate interference or extend range.
- ⚡ Low Power Consumption: Efficiently designed to draw only ~10mA, making it safe for use with sensitive 5V logic boards.
- 🧩 Compact Form Factor: Small PCB dimensions (30mm x 15mm) allow for discreet installation inside controller boxes and equipment.
- 🏗️ Plug-and-Play Wiring: Simple pin-out allows for quick connection to relays, motors, or GPIO pins without complex soldering.
📋 Technical Specifications
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Parameter
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Details
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|---|---|
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Operating Voltage
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DC 5V
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Channels
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4CH (Independent Outputs)
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|
Frequency Band
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433 MHz (ASK Modulation)
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Sensitivity
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-105 dBm
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Max Transmission Distance
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Up to 200m (Open field / Line-of-Sight)
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Data Rate
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10 kbps
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Dimensions
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30 × 15 × 5 mm
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🛠️ Installation Tips (Expert Advice)
- Antenna Length: For best results, ensure the external wire antenna is at least 17cm long. A quarter-wave antenna provides the maximum gain for this frequency.
- Voltage Warning: Do not power this directly with 12V. It requires a stable 5V supply.
- Tuning: If your system triggers randomly (“ghost switching”), adjust the green potentiometer clockwise to reduce sensitivity until the problem stops.
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