433MHz RF Wireless Transmitter and Receiver Module Pair – High-Frequency ASK Module for Remote Control and Data Transfer

Product Description The 433MHz RF Wireless Transmitter and Receiver Module Pair is a cost-effective solution for short-range wireless data communication. Operating on the 433MHz ISM (Industrial, Scientific, and Medical) band, this pair uses Amplitude Shift Keying (ASK) modulation to transmit digital signals through walls and obstacles. The kit consists of a compact square transmitter and a slightly larger rectangular receiver. It is the go-to choice for DIY remote controls, wireless security systems, home automation, and simple telemetry projects. When paired with an encoder/decoder IC or a library like RadioHead, it allows microcontrollers to exchange data packets reliably without physical wiring.

Key Features

• Complete Link Pair: Includes both the transmitter (FS1000A) and matching receiver module for immediate bi-directional or unidirectional setup.

• Wide Voltage Range (Tx): The transmitter can handle up to 12V; increasing the voltage directly increases the transmission range.

• Low Power Consumption: The receiver draws only 4mA, making it ideal for battery-powered standby monitoring.

• Wall Penetration: 433MHz frequency offers better obstacle penetration compared to 2.4GHz systems, suitable for indoor use.

• Simplicity: No complex protocol setup required; the modules function as a wireless "wire" for TTL serial data or pulses.

Technical Details

• Modulation Principle: Utilizes ASK (Amplitude Shift Keying) where the carrier wave's presence or absence represents binary 1s and 0s.

• Frequency Stability: Features a SAW (Surface Acoustic Wave) filter on the transmitter for stable frequency output regardless of temperature changes.

• Transmitter Interface: 3-Pin layout: ATAD (Data In), VCC, and GND.

• Receiver Interface: 4-Pin layout: VCC, DATA, DATA (redundant), and GND.

• Encoding Necessity: These are raw RF modules; they require software encoding (like Manchester encoding) or hardware ICs (HT12E/HT12D) to filter out ambient noise.

• Antenna Design: Features dedicated solder pads (ANT) for attaching a 17.3cm copper wire (1/4 wavelength) to maximize communication distance.

• Super-Regenerative Receiver: The receiver utilizes a high-gain circuit to detect weak signals, with a sensitivity rating of -105dBm.

• Data Throughput: Optimized for low-speed data transfer up to 4kbps, ensuring signal integrity over longer distances.

• Operating Temperature: Reliable performance from -10°C to +70°C, covering most residential and hobbyist environments.

• Logic Level Compatibility: 5V TTL logic level is native; use level shifters for 3.3V devices to prevent receiver saturation.

• Multi-Node Support: Can be used in "One-to-Many" configurations where one transmitter speaks to multiple receivers.

• Physical Build: Miniature FR-4 PCB with high-quality induction coils and SMD components.

• Inductive Tuning: The receiver features a tunable inductor (pre-calibrated) for frequency alignment.

• Noise Immunity: While susceptible to atmospheric noise, the pair works excellently when used with CRC-checked data packets.

• Compliance: Operates on the unlicensed 433MHz band, compliant with standard hobbyist regulations.