10 LEDS Audio level vumeter

Posted on Jul 5, 2012

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs providing a logarithmic 3 dB/step analog display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors.

10 LEDS Audio level vumeter
Click here to download the full size of the above Circuit.

This circuit uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs. The input voltage can vary from 12V to 20V, but suggested voltage is 12V. The IC contains an adjustable voltage reference and an a

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