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Audio Level Indicator Circuit Diagram using LM339 ...
https://electronicsarea.com/audio-level-indicator-using-lm339/
An LM339 integrated circuit is used to achieve our goal. This integrated circuit has 4 comparators that can be powered by a single polarity voltage source. The input signal is applied to a resistor-potentiometer network which is used as a voltage divider, controlling the amplitude of the signal that is applied to the first comparator.
Audio VU/Sound Level Meter with LM339 - Electronics-Lab.com
https://www.electronics-lab.com/project/audio-vu-sound-level-meter-with-lm339/
Audio VU/Sound Level Meter with LM339 Rajkumar Sharma 8.388 Views easy Tested This is an “ Audio VU Meter ” or “ Sound Level Meter ”, it is a general-purpose bar-graph Audio VU meter designed for fun projects. All you need is to hook up one wire to the output of the audio amplifier’s speaker pin along with GND and see the magic.
LM339 data sheet, product information and support | …
https://www.ti.com/product/LM339
The LM339 and LM339A devices are characterized for operation from 0°C to 70°C. The LM2901, LM2901AV, and LM2901V devices are characterized for operation from –40°C to +125°C. open-in-new Find other Comparators Download Similar products you might be interested in open-in-new Compare products
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