“In this video we make a sound level meter using an Ardiuino Una, a 1.3” OLED display and a microphone breakout board.
Arduino Sound Level MeterIn this video we make a sound level meter using an Ardiuino Una, a 1.3” OLED display and a microphone breakout board. The sketch samples the AC waveform of the microphone for 50ms and records the minimum and maximum values. This gives us the peak-to-peak value for the sound.Then we convert this value to a calibrated decibel numeric value and then map that value to create a bar graph.”