The basic idea of this Arduino Water Fountain is to take an input from any external sound source like mobile, iPod, PC etc., sample the sound and break it down to different voltage ranges, then use the output to turn on various Relay. We first used a condenser mic based sound sensor module to perform on the sound source to split the sounds into different voltage ranges. Then the voltage will be fed to op-amp to compare sound level with a particular limit. The higher voltage range will correspond to a relay switch ON which comprises a musical water fountain operating to the beats and rhythms of the song. So here we are building this Musical Fountain using Arduino and sound sensor.
Find here the full project: https://circuitdigest.com/microcontroller-projects/arduino-controlled-water-fountain-using-sound-sensor
Watch the project demonstration video here: https://www.youtube.com/watch?v=kEwq_YNiBbE