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LED Audio Level Meter Circuit Using 2N4401 Transistors
https://circuits-diy.com/led-audio-level-meter-circuit-using-2n4401-transistors/
An LED audio level meter is an electronic testing device that shows the intensity level of any audio signal with respect to its audio amplitude. It has …
LED Sound Level Indicator Circuit - Making Easy Circuits
https://makingcircuits.com/blog/led-sound-level-indicator-circuit/
Circuit Description From the figure below, you can see the Sound Level Meter. Audible tone is detected by MIC1 (an electret microphone element) …
VU meter circuit Stereo 20 LED with PCB | ElecCircuit.com
https://www.eleccircuit.com/led-vu-meter-circuit/
The main of this circuit is LM3914N or LM3915. Which the external circuit is the same. Difference of LM3914 & LM3915 LM3914N will display an …
Simple 20 LED Vu Meter Using LM3915 : 6 Steps - …
https://www.instructables.com/Simple-20-LED-Vu-Meter-Using-LM3915/
The VU meter circuit is usually applied to an amplifier circuit so that the level of audio power can be determined by certain parameter settings which will be displayed in the form of light from the LED. The number of LEDs used for indicators varies depending on the manufacturer. For the VU meter that I made, I used 20 LEDs.
LED Audio VU Meter
https://www.sound-au.com/project60.htm
The LED meter is simpler and smaller than its analogue counterpart, and is very common in audio equipment. This version is based on a National Semiconductor IC, and uses the logarithmic version. Each LED operates with a 3dB difference from the previous one, and a jumper is provided to allow dot or bar mode.
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