Hello guys!
I'm using an Arduino Uno to make a RGB light pattern based on sounds from a microphone (actually it's an old little speaker) and for making some 8 bits music, just for fun . Connecting the speaker directly to the arduino I/O and to GND it could get some weak signal from loud sounds and make some almost inaudible music, but worked almost better than i expected XD
I have been using in this config by days, but today i finished my PCB for my prototype of bi-directional audio amplifier based on a TL074 and plugged it on the Arduino, and now the problems begin.
1°- The receiving signal is impossible to read (As i don't have acess to oscilloscope, just the arduino).
2°- The output signal is lot weaker than directly to Arduino
3°- I used some examples from some forums and online calculator tools to make the parts of this circuit. The variable gain and the crossover i searched for audio specific applications, but the thing of putting the 2-way amplifier was from random applications with others AmpOps, so i'm thinking that this would be ruining the circuit.
I'm using an Arduino Uno to make a RGB light pattern based on sounds from a microphone (actually it's an old little speaker) and for making some 8 bits music, just for fun . Connecting the speaker directly to the arduino I/O and to GND it could get some weak signal from loud sounds and make some almost inaudible music, but worked almost better than i expected XD
I have been using in this config by days, but today i finished my PCB for my prototype of bi-directional audio amplifier based on a TL074 and plugged it on the Arduino, and now the problems begin.
1°- The receiving signal is impossible to read (As i don't have acess to oscilloscope, just the arduino).
2°- The output signal is lot weaker than directly to Arduino
3°- I used some examples from some forums and online calculator tools to make the parts of this circuit. The variable gain and the crossover i searched for audio specific applications, but the thing of putting the 2-way amplifier was from random applications with others AmpOps, so i'm thinking that this would be ruining the circuit.
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