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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 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
![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/cuNFj.jpg)
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 operational amplifier - Op amp LM324 as pre-amp to LM3915 LED VU Meter - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/4zAJC.jpg)