B-Tech Electronic Systems - Prototyped a 12 LED VU Meter for a project, Uses just 3x LM324 Quad Op-amp ICs a few resistors and a decoupling capacitor, it works surprisingly well for
![operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/xwiy2.jpg)
operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange
![2pcs PEAK Lamp + 1pcs Driver Board TN-65F VU Meter Table Head op amp DB Power Amplifier Mixer level lamp peak Sound Pressure - AliExpress 2pcs PEAK Lamp + 1pcs Driver Board TN-65F VU Meter Table Head op amp DB Power Amplifier Mixer level lamp peak Sound Pressure - AliExpress](https://ae01.alicdn.com/kf/H65c70ea5b95543679d4950ea28277a03H/2pcs-PEAK-Lamp-1pcs-Driver-Board-TN-65F-VU-Meter-Table-Head-op-amp-DB-Power.jpg)
2pcs PEAK Lamp + 1pcs Driver Board TN-65F VU Meter Table Head op amp DB Power Amplifier Mixer level lamp peak Sound Pressure - AliExpress
![8 LED VU meter made of IC-LM324. This circuit can be used to display the variation of an au… | Electronic schematics, Electrical wiring colours, Electronics circuit 8 LED VU meter made of IC-LM324. This circuit can be used to display the variation of an au… | Electronic schematics, Electrical wiring colours, Electronics circuit](https://i.pinimg.com/474x/a6/8e/3a/a68e3a18296204cdff43f5a3746b1584.jpg)
8 LED VU meter made of IC-LM324. This circuit can be used to display the variation of an au… | Electronic schematics, Electrical wiring colours, Electronics circuit
![Music Spectrum Indicator VU Meter High Accuracy Mini DIY for Industry for Office for Home (#1): Amazon.com: Industrial & Scientific Music Spectrum Indicator VU Meter High Accuracy Mini DIY for Industry for Office for Home (#1): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/51dp26t0TvS._AC_UF894,1000_QL80_.jpg)
Music Spectrum Indicator VU Meter High Accuracy Mini DIY for Industry for Office for Home (#1): Amazon.com: Industrial & Scientific
![operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/yZ2qV.png)
operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange
![2pcs TN-65F PEAK Lamp High-precision VU Meter Table Head op amp DB Power Amplifier Mixer level lamp peak Sound Pressure Meter - AliExpress 2pcs TN-65F PEAK Lamp High-precision VU Meter Table Head op amp DB Power Amplifier Mixer level lamp peak Sound Pressure Meter - AliExpress](https://ae01.alicdn.com/kf/Hcfbce652ce5f458aaeacee020d524546e/2pcs-TN-65F-PEAK-Lamp-High-precision-VU-Meter-Table-Head-op-amp-DB-Power-Amplifier.jpg)