The remote doorbell is different from the ordinary doorbell. It is an installation-free doorbell. It consists of two parts. The doorbell product has always been a product popular with consumers and has not been eliminated from ancient times to the present. Moreover, with the continuous improvement of the development of science and technology, the wireless doorbell has been developed to bring convenience to our lives.

Wireless doorbell is also known as wireless remote control doorbell or remote doorbell. Common wireless doorbells include wireless doorbells without batteries, ordinary wireless doorbells, and visual wireless doorbells. The wireless doorbell is a type of doorbell developed using civilian wireless technology. The general wireless doorbell is about 40 meters in effective transmission distance and can reach a distance of 400 meters in a barrier-free environment. The wireless doorbell does not require wiring, and the installation is simple and flexible, but the transmission distance is greatly affected by the transmission distance and the site environment. The wired doorbell is just the opposite. Ordinary wireless doorbells require the use of batteries, and they need to be replaced in time. Wireless doorbells that do not use batteries rely on hand-button power generation technology to power off battery limits.

Remote doorbell structure

1. The transmitter and receiver: This doorbell is actually composed of these two appliances.
2. Digital: The basic principle and wireless microphone speaks at the amplifier receiver is a reason. It is just that the analog remote doorbell's transmission signal is an analog signal. The corresponding receiving circuit is an analog circuit.

Remote doorbell principle

The remote control doorbell is mainly composed of a remote control rf transmitter and a receiver. The main component of the transmitter is a miniature radio transmitter. When the user presses the transmitter button, it can radiate high-frequency signals to the air through the built-in antenna. This kind of transmitter modulating oscillator actually uses a common basic integrated circuit, through linking, it becomes a self-oscillating multi vibrator, and then outputs a square wave frequency to the outside.

The receiver is composed of a radio receiver and an audio decoder and a sounder integrated circuit. After receiving the signal from the transmitting module through the radio receiver, the receiver performs amplification and then sends the signal to the audio decoder. The decoding process is then performed by the decoder. The last signal transmits a large sounder. When someone visits, pressing the doorbell button will cause the sounder to make a "click" sound.