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VU METER // make a easy to professional led METER'' BC-547

How do I exchange LCD display with 7-segment LED display

How to Make a simple LED Audio Spectrum Analyzer with Lm358

How to make Vu Meter any op amp ic/vu meter use lm-358

Police car flush light circuit diagram using 6 bc547 transistors

HOW TO MAKE 8CHANNEL TRANSMITTER AND RECEIVER USING CD4017 IC