Police Car Emergency Signaling System

A police car emergency system with modern elements has been developed and implemented, bringing innovation to the already existing commercially available beacons. The new features of the work are present both on the visual side, in the LED light displays with predefined texts to be shown, and on the audio side, in the sound messages of warning. Numerous electronic components have been used for practical implementation to bring the whole concept to life. LED matrix and power LEDs were successfully used to develop the visual part of the police system. The MP3 module and its related circuit led to the audio implementation of the proj ect. The audio control was achieved using a two-channel relay to connect signal wires from a horn microphone and the MP3 module. The entire system is controlled with Arduino N ano development boards.