This circuit can easily be assembled on a small piece of prototyping board. Use low-current types for the LEDs. They have a low forward voltage and are fairly bright at current levels as low as 1 mA.

Sound is pressure — the louder the sound, the greater the pressure. The greater the pressure, the more damage it can do to your ears. If you’re in a noisy environment, it’s important to know how ...

Lucía Garbo has created an Arduino powered noise pollution monitor, powered by an Arduino Mega micro-controller and housed in a 3D printed case. Other components include a SparkFun Sound Detector and ...

The circuit is designed to measure and monitor the level of an input audio signal by displaying an on the spot reading and not the peak reading. Audio or Sound Level – refers to the intensity, amount, ...