I don't really want to bring attention to that post of mine, because it's a bit of an embarrassing one on my part, but a good learning experience nonetheless.
In that post, I basically asked for a circuit that would take an audio signal and centre it at 2.5V (clamped between 0V and 5V). Although I wanted to use it for LED strips, I didn't actually have any led strips to control.
Months later I do! I came back to the post looking for a circuit knowing there's lots there. I ended up settling on BobTPH's circuit because that was exactly what I wanted - and it worked (honestly not sure how it didn't work when I tried it back then)
However, the output of this circuit, and others I have tried, all seem to be inverted, like below (what's the reason for this?):
Anyway, for the sake of continuity, I want the input to be the same as the output, not flipped upside down. Normally I could use an inverting amplifier but I believe because of the way the audio signal is (entered @ 2.5V), a normal inverting amplifier will not work:
(blue line is output of inverting amp)
Is there a simple way to invert the output signal?
(I just though - about three seconds before posting - maybe I can put the inverting amp on the very input, so the audio going into the first LT1366 is inverted, meaning the output is the right way up)
In that post, I basically asked for a circuit that would take an audio signal and centre it at 2.5V (clamped between 0V and 5V). Although I wanted to use it for LED strips, I didn't actually have any led strips to control.
Months later I do! I came back to the post looking for a circuit knowing there's lots there. I ended up settling on BobTPH's circuit because that was exactly what I wanted - and it worked (honestly not sure how it didn't work when I tried it back then)
However, the output of this circuit, and others I have tried, all seem to be inverted, like below (what's the reason for this?):
Anyway, for the sake of continuity, I want the input to be the same as the output, not flipped upside down. Normally I could use an inverting amplifier but I believe because of the way the audio signal is (entered @ 2.5V), a normal inverting amplifier will not work:
(blue line is output of inverting amp)
Is there a simple way to invert the output signal?
(I just though - about three seconds before posting - maybe I can put the inverting amp on the very input, so the audio going into the first LT1366 is inverted, meaning the output is the right way up)