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How to make a Simple VU Meter With 80 LEDs IC LM3915 - YouTube
LM3915, LM3916 Vumètre / Vu meter
LED Vu meter circuit (LM3914)
Simple 20 LED Vu Meter Using LM3915 : 6 Steps - Instructables
circuits: 10 LEDs Audio VU Meter circuit with LM3915
operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter
