An audio level LED indicator DIY kit is a type of electronic kit that allows you to build a device that displays the level of an audio signal using a series of LEDs. The kit typically includes all of the necessary components, such as a circuit board, LEDs, resistors, and an amplifier IC, as well as a set of instructions for assembling the device. When an audio signal is applied to the input of the device, the amplifier IC amplifies the signal and the resulting voltage is used to drive the LEDs. The number and brightness of the LEDs that are lit up can be used to indicate the level of the audio signal. These types of kits are commonly used in audio projects and can be used to build a variety of audio level indicators, such as VU meters and peak level indicators.

This DIY board provides a constant current output and can be used with 3.5V-12V power supply to display the level of noise in an environment. A minimum noise threshold can be set to tune the sensitivity of the device to work noisy environments.