Hi Dave,
Do you have a substitute amplifier board that will amplify your voice? That part may be a little tough, to get a PIC to amplify audio.
If you have an amplifier board or could build / buy one, the PIC may be able to do the rest.
Instead of a mechanical push-button switch, the A/D input or the comparator input could be used to “trigger” on a preset level. Some times called “VOX” (voiced operated transmission), this is used for hands free transmitter control.
You could tap into the audio and allow an adjustable threshold (voice) level to tell the PIC
to be ready to playback your sounds. When the level drops below the threshold for a programmed period of time that would tell the PIC to play the sound now.
In other words; the PIC senses you are talking and then, that you have stopped talking. So it plays the sound, into the audio amplifier.
You have to figure out how to get the sound you want out of the PIC.
Interesting project
-Adam-
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