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Audio - VU meters & spectrum analyzers
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This nifty sound level meter is a perfect one chip replacement for the standard analog meters. It is completely solid state and will never wear out. The whole circuit is based on the LM3915 audio level IC and uses only a few external components.
author: visits: 29525 
This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project. It produces fantastic displays on three LED bars that can be individually adjusted for any particular frequency range.
author: visits: 22744 
This circuit indicates audio output power via three LEDs. Nice addon to your amplifier.
author: RED Free Circuit Designs visits: 8466
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