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HI,
Can anyone help me with a circuit that can be used as a lowpass filter.
I have been looking at simple RC lowpass filters, but are these accurate enough to detect a bass audio frequency. Or are Op-amp circuits more accurate to detect a sub 250Hz frequency.
Also if i am using a direct line from an audio source or a microphone to detect the sound, what will the output voltage? Will i need to amplify this using an op-amp so that it can pass through the filter.
My Last question is, can i use a PIC to detect a certain group of frequencies from a large range.
Thanks for your help.
Any info will be appreciated.
HI,
Can anyone help me with a circuit that can be used as a lowpass filter.
I have been looking at simple RC lowpass filters, but are these accurate enough to detect a bass audio frequency. Or are Op-amp circuits more accurate to detect a sub 250Hz frequency.
Also if i am using a direct line from an audio source or a microphone to detect the sound, what will the output voltage? Will i need to amplify this using an op-amp so that it can pass through the filter.
My Last question is, can i use a PIC to detect a certain group of frequencies from a large range.
Thanks for your help.
Any info will be appreciated.