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Topic: op amp audio amplifier circuit help/suggestion (Read 3924 times) previous topic - next topic

DuaneB

Hi,

I want to extend my vu meter to be frequency based, I was thinking of having three or four bands with each band having it's own vu meter based on the resistor ladder/comparator circuit.

I am not sure whether I should take the signal through three opams with unity gain which will feed three copies of the input signal to three separate filters or whether I can skip this buffer stage and go straight into a branch to three filters without the opamps splitting out/bufferong three copies of the signal first to three separate filters.

I have added an additional line out from my Audino synth so either way I can figure out what works using the Audino as a frequency generator.

If anyone has some previous experience, please share otherwise I will get back withnhow I get on in a few days time.

Duane

Read this
http://rcarduino.blogspot.com/2012/04/servo-problems-with-arduino-part-1.html
then watch this
http://rcarduino.blogspot.com/2012/04/servo-problems-part-2-demonstration.html

Rcarduino.blogspot.com

iyahdub

You want a simple Spectrum analyzer then ?!? like this http://www.youtube.com/watch?v=BtkPDLJpEbQ&feature=related ?!?
Im actually doing one with with the LA3607x2  and an LCD 16x2 with bars,using the last two for the stereo(l/r)
10 LET Loop=Infinite
20 GO TO 10

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