PIC Audio

[b1arrk5]

Dave,
For something simple, take a look at Radio Shack catalog #277-1008, a little 9 volt powered audio amplifier, it runs about $14.00 US, and is in most of the stores. Then add part #276-1323, it's a little digital sound recorder. It holds up to twenty seconds of low fidelity audio. Record your squelch sound from a walkie talkie, or whatever onto the recorder board. Put a little microphone inside your helmet, wire a cord down to the PIC. Let the audio from the microphone go into the amplifier, now your voice will be 'distorted' by the little speaker in the amp. When you finish speaking, let the PIC trigger the little recorder board to play the recording. The recorder runs on 9volts too, and costs about $11.00.

I've used both of these items to put together a quick demonstration for a client, I fed the audio from the amp to a bigger speaker for better fidelity, and it worked great. The hardest part was soldering my PIC driver circuit onto the recorder printed circuit board to parallel the PLAY pushbutton, (it's a little button, and my eyes are old!)

Hope this helps,

Jerry.

[toofastdave]

Norm,
Thanks for the advice on the SPI setups...I'm back home from a long trip and will be sitting down to look at this in detail.

Jerry,
I am way past the point where I can say I'd be limited to that dollar amount... holy cow. I got an evaluation system for one of the ISD systems so I can play around with storage devices... and pics, caps, resistors.. the whole shebang... I am waaay above where I should be in the $$$$ department but if it works then it would be worth it for me. I am not one to try to save money when I am building something so...I end up spending way more than I should. I'll keep you guys posted on progress.

Thanks again!
Dave