Noise level meter
Lights up as the room gets louder.
I want to build a noise level meter on an Arduino Uno with a sound sensor module and an 8x8 MAX7219 LED matrix that shows a bar for how loud the room is.
Parts
Arduino Uno R3 CH340G In stock
Analog Sound Sensor Module (LM393-based electret microphone) In stock
MAX7219 Dot Matrix Module (green) In stock
23 AWG Multi-Strand Breadboard Wire In stock
Resistor Variety Pack - , 10 Values, 1/4W Carbon Film In stock
USB Type A to B Cable (1m) In stock
9V 1A Power Supply Adapter In stock
Pins, wiring and code
The pin table, the wiring steps and the code for this build are in Soldr. Start this build on Soldr - you can change it before you buy.