FM transmitter system board open source
This is the simplest form of FM transmitter, capable of transmitting broadcast music or voice to a range of up to 50 meters, depending on the type of antenna used.
This is the simplest form of FM transmitter, capable of transmitting broadcast music or voice to a range of up to 50 meters, depending on the type of antenna used.
BA1404 is a low-voltage, low-power design with a maximum power consumption of 500mW.
What are their main functions and differences? Let’s take a look.
Antenna gain refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power. It quantitatively describes the degree to which an antenna concentrates the input power and radiates it.
Antenna gain is a very important part of the antenna knowledge structure, and of course it is also one of the important parameters for selecting an antenna
The relationship between the size of the general designed antenna and the operating frequency of the antenna is:
Antenna length = C/(2f)
A simple and convenient method of making a radio antenna, the effect is very good, and it is now posted to share with everyone.
Reflectors are widely used to change the lobe pattern of an antenna. Using a sufficiently large flat reflector can eliminate the back radiation of the antenna and significantly increase the antenna gain
The evaluation and production methods of the flat-panel booster antenna are complete. It seems that the finished antenna still has advantages.
Antenna gain is a measure of how much power is radiated in a particular direction by an antenna compared to a hypothetical isotropic radiator (an antenna that radiates equally in all directions). Antenna gain is usually expressed in decibels relative to an isotropic radiator (dBi) or a dipole radiator (dBd).
AM (Amplitude Modulation) and FM (Frequency Modulation) are two different methods of broadcasting radio signals, and they have several key differences
What are analog signals and digital signals? Analog signals include: C-VIDEO multiplexing video signal, S-VIDEO separated video signal, YPRPB component video signal, security industry BNC interface, VGA interface, etc
There is a big difference between analog and digital signals. The analog signal uses a continuously changing value to represent the information to be explained;
Do you know the difference between analog and digital signals? Before we know that, we must know what is an analog signal and what is a digital signal.
It is mainly a continuous signal as opposed to a discrete digital signal. Analog signals are distributed in every corner of nature, such as daily temperature changes, while digital signals are artificially abstracted signals that are discontinuous in time.
The difference between digital high-definition color TV and quasi-high-definition color TV
Au fur et à mesure que la technologie d’affichage de la télévision haute définition (HDTV) mûrit, la qualité du traitement vidéo et audio analogique finira par différencier les téléviseurs. Le traitement numérique en TVHD (y compris la mise à l’échelle de l’image, le désentrelacement et la démodulation MPEG) continue de jouer un rôle important, mais ces fonctions seront bientôt normalisées.
Judging from users’ demand for high-definition audio and video entertainment, high-definition and digitalization are one of the inevitable directions for the development of TV.
HDTV standards have about 18 options for display formats, among which 1080i and 720P are both internationally recognized digital high-definition television standards.
The image signal and sound signal transmitted by traditional analog TV are continuously changing voltage and current.
Digital TV (Digital TV) is a digital TV broadcasting system that digitizes the entire broadcast link from the collection, editing, dissemination, and reception of TV signals.
The secret to maintaining reliable, high-quality service in different digital TV transmission systems is to pay attention to those key factors that may undermine the integrity of the system.
Digital television (or DTV) is a new type of television system that uses digital signals to broadcast images and sounds. It uses digital signal processing in the entire process from program editing, compression, transmission to receiving TV programs.
On the premise of introducing the basic concept and background of digital TV, this paper introduces the main parameters and main instruments of digital TV testing, and introduces the development status of digital TV testing industry.
TV transmitter is a device that takes a video and audio signal and transmits it to an antenna to be broadcast as television
Television transmitters and radio receivers are both important components of the broadcasting system, serving different but complementary functions in the transmission of television signals.
A radio station introduction typically serves as an advertisement for the station and its programming.
Digital TV transmission technology has changed from traditional analog TV to digital TV, which has higher image and sound quality, larger channel capacity and higher data transmission rate.
At present, solid-state transmitters are the most basic form of communication in the process of digital information transmission
This paper introduces and analyzes in detail the technical characteristics and trends of the development of digital TV transmitters
The smart phone FM transmitter realizes the communication between the single-chip microcomputer R7F0C807 and the smart phone APP through the 3.5mm standard audio interface, and controls the FM chip to transmit frequency modulation information through the I/O port (analog IIC), and realizes the application of the car FM transmitter function .
Antennas are an essential part of wireless transmission. Except that we use optical fibers, cables, network cables, etc. to transmit wired signals, as long as the signals are transmitted by electromagnetic waves in the air, various forms of antennas are required.
BA1404 stereo fm transmitter is a low-voltage, low-power design with a maximum power consumption of 500mW
How to choose a spectrum analyzer is essential for signal analysis. So what is a spectrum oscilloscope? Where can it be applied?
Building an FM transmitter and broadcasting our own signal on the radio is indeed a fun project. In particular, use this circuit because it doesn’t require you to wind your own inductor or use a trimmer and spend hours tweaking the circuit to make it work.
1. Rx Sensitivity (receiving sensitivity)
Receiving sensitivity, which should be one of the most basic concepts
In this article, we will learn how to build a simple, stable and digitally controllable FM transmitter.
The miniature FM FM transmitter circuit introduced here is a kind of miniature wireless FM microphone.
The exciter of the FM302E-I type FM transmitter adopts the HPB-1210 motherboard of Japan NEC Company. Direct frequency modulation of the carrier, using phase-locked frequency stabilization and frequency synthesis technology.
With the proliferation of wireless devices, strong signal strength and high-quality RF antenna design and integration are now required for optimal performance.
FM transmitter circuit diagram Daquan (FM radio / FM intermediate frequency / megawatt radio transmitter circuit diagram detailed explanation)
One cool project I’ve been wanting to build is an FM transmitter with a good range. I’ve always been fascinated by some applications of transmitters
The FM radio transmitter is composed of different signal equipment, mainly composed of high-frequency equipment, low-frequency equipment, and power supply equipment. High-frequency equipment and low-frequency equipment cooperate with each other to complete signal transmission and amplification in an orderly manner.
today I will explain to you the fixed asset classification names related to broadcasting and TV transmitting equipment contained in the asset classification module in the fixed asset management system.
all-solid-state transmitters have been widely developed in the TV industry. This article mainly analyzes the performance and working principle of the all-solid-state TV transmitter based on my many years o
First of all, the most important thing is the frequency band. The FM frequency band is not an amateur radio frequency band. It is managed and allocated by relevant radio agencies.
Radio amateurs, or hams, are not so much a special group as they are a collection of several different special groups.
The polarization of the antenna is an important theory of the antenna, which mainly refers to the direction of the electric field strength formed when the antenna radiates.
This article will mainly focus on circularly polarized antennas.
What is the difference between a circularly polarized antenna and a linearly polarized antenna?
dBi, dB, dBm, dBd, dBc, they all look similar, but the difference inside is still obvious.
What is a Dual Band Dipole Antenna?
The loudness of an audio program on broadcast is increased by reducing the peak-to-“average” ratio in dynamic audio.
AM requires a threshold for demodulation, and the signal will have a certain attenuation during long-distance transmission, coupled with noise interference, so it is easy to make a wrong
In the case of high-power communication signal transmission, reducing the loss of the cable is much more cost-effective than increasing the transmission power.
I introduced a Github project of a very interesting wireless FM radio station, which can turn the Raspberry Pi into a small FM radio station through code without borrowing other external devices.