Micro Wireless Monitor FM FM transmitter circuit

The circuit consists of a language and sound FM transmitter. It is mounted on a 25mm x 35mm PCB, designed to be placed on a table. When activated by pressing the micro switch SA, the circuit transmits an FM radio signal to request assistance. This circuit is suitable for use in banks, shops, and other environments.

The FM transmitter circuit is designed to provide a reliable means of communication in emergency situations. The compact PCB layout allows for easy integration into various environments, particularly in commercial settings such as banks and retail stores where security is paramount.

The core components of the circuit include an FM modulator, which is responsible for encoding the audio signal into a frequency-modulated format. The audio input can come from a microphone or other sound source, which captures the user's voice or distress signal. The micro switch SA serves as the activation mechanism; when pressed, it initiates the transmission process.

In operation, the circuit continuously monitors the state of the micro switch. Upon activation, the audio signal is processed by the FM modulator, which adjusts the carrier frequency to encode the sound. The output of the modulator is then fed to an antenna, which broadcasts the FM signal over a specified range. The transmission can be received by any standard FM radio tuned to the correct frequency, allowing for immediate assistance to be summoned.

To enhance the reliability and functionality of the circuit, it may include additional features such as a power supply circuit, which ensures stable operation. A battery backup could also be integrated to maintain functionality during power outages. Furthermore, the design can incorporate a low-pass filter to reduce noise and improve signal clarity.

Overall, this FM transmitter circuit is a practical solution for enhancing security measures in vulnerable locations, providing a quick and effective means of communication in emergencies. Circuit is shown. It consists of language and sound circuit FM transmitter circuit. The entire circuit is mounted on 25mm 35mm PCB, placing the table side, when there Jiezei bu rglary, just press about micro switch SA, thief FM radio signal will be issued for help. The circuit can be used in banks or shops and other occasions.