Instead of blank panels... what about this (led vu-meter)? - DIY STUFF - Look Mum No Computer Thingies
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How To Make Led Vu Meter Circuit AN6884 Simple | How To Make Led Vu Meter Circuit AN6884 Simple | By Creative Channel | Facebook
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Peak Hold Led Bar Vu Meter Circuit – Electronics Projects Circuits
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LED VU Meter using LM3914 and LM358
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4 Simple VU Meter Circuits Explained | Homemade Circuit Projects
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