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LED - Stereo Volume Unit (VU) meter
This is a stereo volume unit (VU) meter for audio equipment. It is a very useful device (basically in sound recording equipment) but you will love it because it also looks great!
The electronic circuit is based on the well known LM3915 IC which senses analog voltage levels and drives ten LEDs on a bar-graph, providing a logarithmic 3 dB/step analog display.
In our VU meter, we use 2 x LM3915 ICs, one for the Right (R) and another one for the Left (L) audio channel, respectively. We also use the MCP6022 - dual operational amplifier IC as Precision Half-Wave Rectifier and preamplifier. The Stereo VU Meter requires 5V, power supply. |
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