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How to build VU Meter 3
August 8, 2010 - category: Sound level meterDescription
A very simple circuit of indication of level, with 10 Led. Is used the circuit of half-wave rectification of precision round the IC2, with gain one. With switch S1, we can select the indication of Led. The level of entry is 60 mV-1.25 V.
Circuit diagram
Part list
- R1-2=10Kohm
- R3-4=1Kohm
- D1-10=LED
- D11-12=1N 4148
- C1=10uF 25V
- C2=1uF 25V
- S1= mini switch
- IC1=LM3915
- IC2=TL071
circuit from http://users.otenet.gr/~athsam/vu_meter_3.htm
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