The RF 433MHz Transmitter and Receiver Kit is the most cost-effective solution for adding wireless remote control functionality to your electronics projects. At Electrapac, we recommend this pair for hobbyists and students in Bangladesh who are building simple wireless doorbells, remote-controlled cars, or wireless security alerts without the complexity of Wi-Fi or Bluetooth.

Product Overview

This kit consists of a small, powerful transmitter (FS1000A) and a sensitive receiver module. They operate on the 433MHz frequency, which is excellent for penetrating walls and obstacles. While the basic range is suitable for indoor use, adding a simple wire antenna can extend the communication distance up to 200 meters in open areas. It is designed to work seamlessly with the VirtualWire or RadioHead libraries for Arduino.

Key Features for Electrapac Customers

• Incredible Simplicity: These modules use a simple 1-wire data interface. You don't need complex SPI or I2C wiring; just power, ground, and a data pin.

• Flexible Power Input: The transmitter can handle up to 12V. Higher voltage increases the transmission power, allowing you to reach that 200m range more reliably.

• Wall-Penetrating Frequency: The 433MHz wavelength is longer than 2.4GHz (Wi-Fi), allowing the signal to travel through brick walls and furniture more effectively.

• Low Idle Power: The receiver consumes very little current, making it ideal for battery-operated "always-on" listening devices.

• Compact Footprint: Both modules are small enough to be hidden inside tiny plastic enclosures or 3D-printed cases.

Wiring & Range Optimization Guide

To get the best performance from your Electrapac RF kit, follow these installation tips:

1. Antenna is Mandatory: For a 200m range, you must solder a 17.3cm piece of solid core wire to the "ANT" hole on both the transmitter and receiver.

2. Transmitter Wiring: VCC to 5V-12V, GND to Ground, and DATA to your microcontroller's digital out.

3. Receiver Wiring: VCC to 5V, GND to Ground, and use either of the two middle DATA pins (they are connected together).

Pro-Tip: If you are experiencing "noise" or accidental triggers, use an encoder/decoder IC like the HT12E/HT12D or use a software library that supports "CheckSum" validation. This ensures your receiver only acts on data that actually came from your transmitter.

Primary Applications

• Wireless Doorbells: Create a custom chime for your home or office.

• Remote Controlled (RC) Cars: Building simple wireless steering and motor control.

• Home Security: Adding wireless reed switches to windows that alert a central alarm.

• Remote Data Logging: Sending simple sensor readings (like soil moisture) from the garden to a base station.

• Wireless Switching: Turning on a pump or a light from across the room.

Why Shop at Electrapac?

We source our 433MHz RF Kits with high-stability oscillators to ensure the transmitter and receiver stay perfectly tuned to each other even in humid conditions. Visit us at for the wireless components that make remote control easy and affordable.