mik3ca Posted October 2, 2006 Report Share Posted October 2, 2006 I'm trying to make my own VU meter, and I only have partial success. What I would like is full LED from full volume. My LED doesn't dance to the music :(The input is a resistor (which varies the strength) and a capacitor in series. This capacitor is connected to any audio source directly.this circuit uses a 2N4403 PNP and a 2N2222 NPN. The last NPN is used to give the LED a boost.I think I am OK with choosing resistor values, but the capacitor values are trouble. If I choose them too high, then I will have to wait while they charge.How do I choose the correct capacitor values?I am interested in converting normal audible sounds into LED signals. Quote Link to comment Share on other sites More sharing options...
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