Elecrow
433Mhz RF Transmitting Receiver Module
A simple 433 MHz RF link kit consisting of a transmitter and receiver pair, commonly used for basic wireless remote control and data transmission between mic...
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A simple 433 MHz RF link kit consisting of a transmitter and receiver pair, commonly used for basic wireless remote control and data transmission between microcontrollers. The ASK (Amplitude Shift Keying) modulation makes these modules easy to use with popular Arduino libraries such as VirtualWire or RadioHead.
The transmitter accepts a wide input voltage range (3–12V), with higher voltage delivering greater transmission power and range. The receiver outputs digital high/low signals that can be read directly by a microcontroller.
Key Features
- 433 MHz ISM Band – Licence-free frequency for short-range wireless communication
- ASK Modulation – Simple amplitude shift keying, compatible with VirtualWire and RadioHead libraries
- Wide TX Voltage Range – 3–12V input; higher voltage increases transmission range
- TX + RX Pair Included – Both transmitter and receiver modules in one kit
- Simple Interface – Single data pin on each module connects directly to a microcontroller GPIO
Specifications
- Frequency: 433 MHz
- Modulation: ASK
- Transmitter Input Voltage: 3–12V DC
- Receiver Data Output: High ~½ Vcc, Low ~0.7V
Ideal For
- Basic wireless remote control projects
- Arduino and microcontroller wireless data links
- Simple sensor data transmission
- Learning about RF communication
Package Contents
- 1× 433 MHz RF Transmitter Module
- 1× 433 MHz RF Receiver Module
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- RF
- RF means radio frequency, referring to signals used for wireless communication and other high-frequency electronics. A low-noise, stable power supply is important for RF circuits because power noise can affect signal quality and measurements.
- RX
- RX means receive, usually showing data being received by the board. An RX indicator LED can help with troubleshooting USB or serial communication.
- TX
- TX means transmit, usually showing data being sent from the board. A TX indicator LED can help you see when the board is communicating or uploading code.
- VCC
- VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.
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Related Tutorials
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