Hi, I'm trying to build up a Led Audio visualizer based on Arduino and a BT audio amplifier.
The project is composed by:
- Bluetooth audio receiver and amplifier (KKmoon TDA7492)
- 2 speakers
- many resistors and leds
The target is to "read" with arduino the audio signal and light on/off a rows of led depending by the signal intensity.
For test purpose, when I use the source signal coming out from the audio out (jack 3,5mm) of the laptop or mobile it works very well.
But, when I try to use the amplified signal (that is the only signal that I'll be available in the final project) coming out from the TDA7492 direct to the speakers... it doesn't work.
How can I "transform" the amplified signal to a "source" signal?
Unfortunately I've not way to "read" the source audio signal (not yet amplified) but only the amplified signal coming out from amplifier vs the speakers.
With this signal the visualizer is not work