An Overview of FS1000A
The FS1000A 433MHz is a wireless RF module, cheap in price, and easy to use. The modules are for wireless systems and projects. In this module, the transmitter can only transmit data and the receiver can only receive that information. It means you can only send information from point one to two and not from two to one.
The module can transfer or receive the data over 3 meters but with proper antenna and power supplies it may reach up to 100 meters theoretically. However, practically one can hardly cover about 30 to 35 meters.
Hardware Overview
Transmitter
The main part of the transmitter module is the SAW resonator which is tuned for 433.xx MHz operation. Moreover, there is also a switching transistor and a few other passive components.
Receiver
The receiver module is a little complex, consists of an RF tuned circuit and some operational amplifiers to amplify the received carrier wave coming from the transmitter. It then provided the coming amplified signal to a phase lock loop (PLL) which permits the decoder to lock onto a stream of digital bits which allows better-decoded output.
Working Principle
When a logic HIGH is given to the DATA input, the oscillator produces a constant RF output carrier wave at the frequency of 433.xx MHz. And, when the DATA input is drawn to logic LOW, the oscillator stops. This technique is known as Amplitude Shift Keying (ASK).
Features and Specifications of FS1000A Modules
Features
- Wide input supply (2.5 V to 12V)
- Easy to integrate (V+, GND, and Data)
- The device in deep sleep mode when Data pin is grounded
- Very small dimension
Specifications of Transmitter Module
- Wireless (RF) Simplex Transmitter and Receiver
- Transmitter Operating Voltage: +5V only
- Transmitter Operating current: 9mA to 40mA
- Operating frequency: 433 MHz
- Transmission Distance: 3 meters (without antenna) to 100 meters (maximum)
- Modulating Technique: ASK (Amplitude shift keying)
- Data Transmission speed: 10Kbps
- Circuit type: Saw resonator
- Low cost and small package
Specifications of Receiver Module
- Operation voltage: DC5V
- Static Current: 4MA
- Receiver frequency: 433.92MHZ; 315 Mhz
- Sensitivity: 105DB
- Dimension：30*14*7mm
- External Antenna：32CM signal wire, spiral
Pinouts of FS1000A RF Module
Transmitter
| Pin No: | Pin Name | Description |
| 1 | Data | accepts data to be transmitted |
| 2 | Vcc | Power Supply between 3.5V to 12V. |
| 3 | Ground | The ground needs to be connected with the ground of the system. |
| 4 | Antenna | Antenna to improve the range |
Receiver
| Pin No: | Pin Name | Description |
| 1 | Vcc | The power supply requires 5V |
| 2 | Data | Receive data |
| 3 | Data | Receive data |
| 4 | Ground | The ground needs to be connected with the ground of the system. |
| 5 | Antenna | Antenna to improve the range |
Applications of FS1000A Modules
Security products
RF modules in security products include fire alarm, intruder alarm, burglar alarm, etc. Hence these security alarms can be found everywhere from industries, offices, buildings, banks, to our home security systems.
Automation Systems
We can develop the project RF-based home automation system using this module to replace the use of conventional switches in the home and other places. The project involves a transmitter that sends signals to the receiver while the receivers are wired with loads.
