[VoIP] 12F683 PIC for Tone Generation

[Donald Froula]

I've been fooling around with the 12F683 PIC
microcontroller for a few months. I am using the
PicBasic Pro compiler, which makes development quick
and easy, compared to assembly language.

I coded up and built a blue box circuit with 12
non-volatile memories. It uses the PicBasic Pro
"FREQOUT" command that can generate single or dual
tones using Pulse Width Modulation. With proper
filtering of the PWM, it could have all sorts of
interesting telephony applications.

Schematic, source code, and programmer hex files are
at the Binrev board:

http://www.binrev.com/forums/index.php?showtopic=36307

Don