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Electrical – What are these transistors doing and how are they working

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How to Make Transistor VU Meter DIY Homemade - TRONICSpro
LED VU Meter circuits using transistors, 5 to 20, 40 LED | ElecCircuit.com

LED VU Meter circuits using transistors, 5 to 20, 40 LED | ElecCircuit.com

VU meter using one transistor - YouTube

VU meter using one transistor - YouTube

Electrical – What are these transistors doing and how are they working

Electrical – What are these transistors doing and how are they working

Transistor Vu Meter Circuit

Transistor Vu Meter Circuit

Analog VU meter circuit using transistors

Analog VU meter circuit using transistors

6 LED VU meter using a single transistor (circuit) - Electronics Area

6 LED VU meter using a single transistor (circuit) - Electronics Area