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Transistorized Bar-Graph Driver

2016-05-08 17:44  
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A resistor network (Rl through RIO) with emitter followers (Ql and Q2) drives LED drivers (Q3 through Q7).
Transistorized Bar-Graph Driver

This circuit was used as a `light organ` to provide visual volume indication. It can be hooked to a speaker, to another audio source, etc.



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