Poging GOUD - Vrij
ESP32-Powered AUDIO-VISUAL SIREN
Electronics For You
|January 2025
This sound alternator is designed to simulate the effects of a police siren, combining sound and light to create a dynamic audio-visual experience.
It uses an ESP32, a small speaker, and two red LEDs to alternate between sound signals and blinking lights. Control is achieved through code written in the Arduino IDE or MicroPython, utilising the GPIO pins of the ESP32.
The ESP32 regulates the sound frequency, enabling the speaker to mimic the distinct tones of a police siren. Simultaneously, it controls the voltage across the LEDs, causing them to alternate in illumination.
Fig. 1 showcases the prototype on a breadboard, with the required components listed in the Bill of Materials table.
Circuit and working 
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