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Suppose you want to transmit radio signals in between two devices? Or you want to connect to any other device without the use of wire? Ever wondered how you can do that seamlessly. This is all possible due to use of the transmitter module. With the help of transmitter module, you can easily transmit radio signals between two devices in the form of radio waves. These modules can help in several functions and helps to ease out several different operations.
What Is A Transmitter Module?
A small electronic unit used for transmitting and/or receiving radio signals between two machines is an RF module. It is also beneficial for an embedded system to interact wirelessly with yet another system. This wireless communication can be achieved by means of optical connectivity or transmission via radio frequency ( RF).
A small PCB sub-assembly, capable of transmitting a radio wave and modulating the wave to carry data, is an RF transmitter module. Usually, a transmitter module is implemented alongside a microcontroller that provides the module with data that can be transmitted. RF transmitters are normally subject to regulatory specifications that determine the specifications for maximum permissible transmission output power, harmonics, and band edge.
Owing to the complexity of designing radio circuits, a transmitter module is commonly used in electrical systems. Because of the responsiveness of radio circuits and the precision of modules and configurations needed to achieve activity on a particular frequency, good electronic radio technology is highly complicated. Moreover, a stable RF communication loop requires close monitoring of the production process in order to ensure that the output of the RF is not adversely affected.
Technical Specifications Of RF Transmitter Module
- Gain flatness, I / p and o / p switching frequency, gain change, transfer gain, compressed point, harmonic stabilization of 1dBm, erroneous & harmonic o / p are the specifications in the RF transmitter module.
- Input & display maximum frequency, boost flatness, gain change, erroneous output, resonant frequency, picture denial, neighboring signal, non-adjacent channel and stabilization of refusal frequency are the specifications of the receiver component.
Working Of Transmitter Module
In general, there are two overriding constraints for the developer of wireless networks: it must function over a reasonable distance and transmit a reasonable amount of information within a connection speed. The transmitter module is very small and compact and has an extensive operating voltage range of 3V to 12V.
These modules are, essentially, 433 MHz RF TX and RX modules. When transmitting logic zero, the transmitter (TX) draws no energy thus absolutely losing the frequency response, thereby consuming considerably low power during battery service. As logic1 is sent, the carrier is completely on with a 3V power supply at around 4.5mA.
For different types, sizes and shapes of electronic circuit boards, RF modules can be implemented. It can also be effective across a wide range of capacities and functionalities for modules. A PCB, TX loop or RX circuit, antennas and serial interface are usually included in these devices for connectivity to the main processor. The categories of RF modules involve, in particular, the RF transmitter module, the RF transceiver module and the SOC module.
Applications Of Transmitter Module
- Transmitter module helps in monitoring of the vehicles.
- Remote control.
- Small range wireless network.
- Helps in access control systems.
- Wireless security systems of home.
- Data terminals which are wireless.
- Fire protection systems which are wireless.
- Alarm systems.
Why Encoders and Decoders are Necessary?
Without the need for encoder and decoder devices, transmitter modules may also work. Simply power the unit with the respective voltage referred to above. But, this approach has a major downside. You can only have one button on the side of the transmitter and one display on the side of the recipient. Therefore, the encoder and decoder components are expected to have even more inputs and outputs.
The HT12D and HT12E are components for the 4-data bit encoder and the decoder. This implies that we can render (2 ^ 4 = 16) 16 different input and output configurations. There are 18 pin IC’s that can supply power from 3V to 12V input power. These 8 implementations have to be set the same on both the encoder and decoder, as they said that they have 4-data bit and 8-address bit, to allow them function as a combination.
Transmitter Module Based Home Automation System
The main objective of this project is the creation of a mobile RF-controlled home automation. Technology is developing day by day currently. We can prevent user problems by using wireless technology. If the client is intellectually disabled, or much older, then they may face several issues. Because to work, they have to go close traditional wall switching and these controls are located in various parts of the building.
Modern houses are moving from traditional switches to a centralized controller with the use of RF powered switches. By using communications connectivity, with the required automatic monitoring, the modules can be switched ON / OFF centrally. To accomplish this, at the edge of the transmitter portion, an RF remote is connected to a microcontroller, which transfers ON / OFF instructions to the receiving end, where modules are associated.
- Range: Several aspects, including the transmitting power of the system, the form of attached transmitter and the nearby barriers or circumstances, influence the scope of a wireless device. The scope described here defines the highest system range in optimal conditions and section-of-sight in open air. If you’re attempting to interact inside or through walls, plants or other obstacles, expect this range to be shorter.
- Power Consumption: This is the amount of power usually consumed by the computer during propagation, your machine should be able to source at least this much power and then some to prevent erroneous actions or brown-out circumstances.
- Frequency: The device’s operating intensity can influence its scope and penetration power, including its propensity to intervene. Lower frequencies involve the efficacy of larger antennas, but when it comes to transmission via walls and obstacles, they often have better penetrating power.
- Tx Power: The Tx (Transmit) Power is the amount of power actually emitted by the system. While this is closely related to range, it’s not the only aspect. To guarantee that you abide with the local radio communication rules, this figure is crucial to bear in mind when choosing an antenna for a computer. The maximum output power is the power specified on this chart and it can be changed in the firmware in case you need to turn it back.
- Data rate: Not just how much information you can send over the network at once, but also how efficiently the system can interact over the air can affect the speed at which the system can communicate over the air. If your network spans a wide distance, a reality exploited by the XSC line of devices, slower transmission speeds can be advantageous. The speeds listed here are maximum and can be changed for some of these devices in the firmware.
With the help of the transmitter module, you can perform several functions. It helps you to transmit information wirelessly from one place to another. In this blog, we have discussed about several important points related to the transmitter module and we hope it helps.