Ian,

Does a Transcendental Meditation Stimulator count as a
'wierd and wacky' pic application.

It uses software pwm to pulse LEDs at brainwave frequencies,
thus causing the brainwaves to syncronize to the frequency
of the LEDs.  Then by slow adjustment of the controls, you
can 'switch tracks' to the state of conciousness that you
desire.

Typically, when your brainwaves and LED rate syncronize,
your body starts to twitch a bit. (Who needs drugs?!)

There is a serial port interface for programatic control,
and a record feature that sends update data back to the
host when the user changes the controls.  This way you could
develop a program exclusive to your euphoria needs and your
specific brainwave frequencies controlled by the PC.  I
haven't done the PC program yet.

There are two variable potentiometers read using a pulsed RC,
for intensity and frequency.  3 i/o.

The serial port is 1200 baud, software emulated, 2 i/o.

The output intensity and frequency are controlled by software
pwm. 1 i/o.

I've implemented it with a 16F84, but it could easily be done
with a 12C508.

Improvements could be made on the intensity side with a few bit
ladder network or DAC so the duty cycle of the pulses remains
constant.  Next step is syncronizing it with the massage action
of the LazyBoy(already hacked in and documented the interface),
and some soothing synthesized music.  Could also add some eeprom,
an lcd, and a keyboard, so PC connectivity isn't necessary. A
waft of ionized heated or cooled air could be integrated into the
effect.

You can send samples to:

Craig Lee
c/o Enlight Inc.
23 Kootenay Place W.
Lethbridge, Alberta
Canada  T1K 6V6


Thanks,

Craig Lee, C.E.T.



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