Hello,
I am trying to control the volume for two 8ohm speakers which will each consume a maximum of 0.3W of power from a LM4880MX amplifier. I have two questions:
1) Can I control the volume for both of them by placing a single potentiometer between the speakers and ground? I would only use two pins on the potentiometer- the wiper and one end.
2) I want to send the un-amplifier audio signal to my Arduino to perform signal analysis using a Fast Fourier Transform. Can I safely send the signal straight from the audio jack to the Arduino analog pin? Arduino pins are designed for 5 volts, and I read that the average Vrms for audio input jacks is about 1Vrms.
Thank you
I am trying to control the volume for two 8ohm speakers which will each consume a maximum of 0.3W of power from a LM4880MX amplifier. I have two questions:
1) Can I control the volume for both of them by placing a single potentiometer between the speakers and ground? I would only use two pins on the potentiometer- the wiper and one end.
2) I want to send the un-amplifier audio signal to my Arduino to perform signal analysis using a Fast Fourier Transform. Can I safely send the signal straight from the audio jack to the Arduino analog pin? Arduino pins are designed for 5 volts, and I read that the average Vrms for audio input jacks is about 1Vrms.
Thank you