➀ This sound alternator simulates the effects of a police siren using an ESP32, a speaker, and two red LEDs. The ESP32 controls the sound frequency and the LEDs' illumination to create a dynamic audio-visual experience. ➁ The circuit diagram includes a transistor, a speaker, two red LEDs, and other components. ➂ The code can be developed in MicroPython, Arduino IDE, or similar IDEs, and uploaded to the ESP32 board for operation.