Op Amp Vu Meter

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08:41:26

Vu Meter, based on an operational quadruple LM324 powered by 5V. The LM339 that is comparator can also be used but the LEDs must be connected to positive (since the output is open collector).
The 1V source is the input reference, it can vary according to the signal to be measured in the volume meter. The diode, capacitor and resistors, is the envelope detector circuit.

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published 5 years ago

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