Mini Audio Level Meter Circuit

This circuit is a audio level meter circuit. Audio levels of individual components and a small panel at the base, the circuit can be monitored using meters. The series again from about 20Hz to 50khz .100 uA meter has a flat frequency response from the full-scale deflection on the input sensitivity 100mV. Based on two common-emitter amplifier, the first step to meet the FSD has a preset resistance. The final step AC voltage swings up to about half the supply voltage is in the works as a bias. 10U DC blocking capacitors and propagate through the bridge rectifier to convert the DC voltage signal to a variety of audio frequencies, the meter reading is the moment “up” does not provide a reading. Here is a schematic audio level meter:

Simple Audio Level Meter Circuit

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