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अपने Amplifier को RGB बनाए 🔴🟢🔵 Simple LED VU Meter - YouTube
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Simple 20 LED Vu Meter Using LM3915 : 6 Steps - Instructables
Amazon.com: LED Audio Level Indicator Module, 12V 250MA LED Audio Level Board Assembled 10 Segment 3mm Lights High Low Input for VU Meter : Industrial & Scientific
Simple 20 LED Vu Meter Using LM3915 : 6 Steps - Instructables