Got today those better opamps, MCM model works better in this circuit, supply voltage is 5v
Hmm, still output from peak detector is 0.4 volts lower than input.
Resistors are 4.7k (r7,r8,r9,r11) and capacitors are mylars(c4 & c8=330n c5=100n), no more ceramics.
Thing of note, if i take output capacitor from peak detector output out, output increases by 0.4 volts
nvm that, i tested with too high frequency
with TLE in place, output at peak detector is at least 200mv all the time
bought these opamps from farnell
i noticed also that lm358's offset can be ''nulled'' in first lm3915, by inreasing lower level. it then drops its sensitivity though but at least bars won't lit without sound applied
but in thi case i need also to change other lm3915's lower lever too, but seems won't be needed
But. it works enough well for now, even though peak detectors output is bit lower than input signal. i'll solder this now to protoboard if that makes any issues better...