Hi
I'm new to PIC applications and have a question regarding use of dsPIC ADC for
measuring Audio output voltage and current.
I'm working on a project to measure the output of an audio amplifier using a PIC
The amplifier can output up to 1000w. I want to do basic measurement of RMS
volts/amps (I know I can do this with existing products, but I want to try doing
this with a PIC)....
I understand use of a PIC ADC for DC voltage measurement. But how does the ADC
interface to an AC source?
Does the signal need to be converted to DC, externally, before the PIC can process it?
Perhaps with an external RMS-to-DC chip?
Or can the audio signal be directly connected, with the appropriate attenuation/dividers, to the ADC input?
thanks
eT
I'm new to PIC applications and have a question regarding use of dsPIC ADC for
measuring Audio output voltage and current.
I'm working on a project to measure the output of an audio amplifier using a PIC
The amplifier can output up to 1000w. I want to do basic measurement of RMS
volts/amps (I know I can do this with existing products, but I want to try doing
this with a PIC)....
I understand use of a PIC ADC for DC voltage measurement. But how does the ADC
interface to an AC source?
Does the signal need to be converted to DC, externally, before the PIC can process it?
Perhaps with an external RMS-to-DC chip?
Or can the audio signal be directly connected, with the appropriate attenuation/dividers, to the ADC input?
thanks
eT