Audio level meter circuit diagrams
Audio VU Meter
This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores. Read more...Audio Peak Level Meter
Using a single MOSFET Op-amp this circuit samples the audio input and displays peak readings. Read more...Audio Level Meter
Audio levels can be monitored using a small panel meter with this circuit built from discrete components. Read more...Audio Indicator
This circuit can be used to remotely monitor a loudspeaker, alarm, or audio source for presence of an audio waveform. It can also be directly connected across loudspeaker terminals used as a peak indicator. Read more...Audio Bargraph Display
An easy to use LED bargraph display to monitor audio levels. Circuit monitors a single channel, so build two for stereo. Read more...
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