Hello, I'm very glad to finally find a good forum about electronics!
I would like to build a simple circuit, that lets 2 LEDs flash when there is an audio signal comming from a source. I'm speaking about a stereo line signal here, so 2 channels and 1 LED per channel only (1 for left, 1 for right). The LEDs should then flash after the audio signal reaches a certain amplitude and this point should be adjustable with a potentiometer.
So very simple actually. I was thinking about realising this with an opamp comparator circuit first, but maybe even a transistor is enough to do this proper!? As I'm not an engineer, I would like to hear some opinions, hints here, from people with more experience than me.
Here's some more info about the situation,
the circuit should meet the following criteria:
- whole thing is 6V Battery powered
- circuit should not draw much current
- the audio signal should not be influenced by the circuit (disturbances etc.)
- circuit should be as simple and small as possible (i'm going to implement this into a very small device)
That's probably it. I'm looking forward to some feedback, thanks in advance.
I would like to build a simple circuit, that lets 2 LEDs flash when there is an audio signal comming from a source. I'm speaking about a stereo line signal here, so 2 channels and 1 LED per channel only (1 for left, 1 for right). The LEDs should then flash after the audio signal reaches a certain amplitude and this point should be adjustable with a potentiometer.
So very simple actually. I was thinking about realising this with an opamp comparator circuit first, but maybe even a transistor is enough to do this proper!? As I'm not an engineer, I would like to hear some opinions, hints here, from people with more experience than me.
Here's some more info about the situation,
the circuit should meet the following criteria:
- whole thing is 6V Battery powered
- circuit should not draw much current
- the audio signal should not be influenced by the circuit (disturbances etc.)
- circuit should be as simple and small as possible (i'm going to implement this into a very small device)
That's probably it. I'm looking forward to some feedback, thanks in advance.