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PICList Thread
'weird and wacky pic apps'
1999\05\06@023722 by Ian Rozowsky

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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.



.

Attachment converted: wonderland:Craig Lee.vcf (????/----) (0002F3F5)

1999\05\06@030149 by Don McKenzie

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Around 1993, when I was possibly one of the very few people that knew
what a PIC micro was in Australia, the local Victorian Police Forensic
dept. contacted me and showed me a portion of a home etched PCB and what
I could read as a PIC16C54. As best I could anyway, as it had been badly
burnt as if it had been thrown into a fire. Checking the circuit out, I
found the oscillator and power pins to be correct, so I was certain it
was a 54 from the markings I could read.

I got my colleague "Big Mick" to verify my findings.

The interesting part was that it had been used as a timing device in a
police station bombing. Now why in the world would anyone use a 54 for
something that you could easily achieve with a simple timer, or 555
circuit?

Hey! we are talking egg-timers here!!

Why etch a board? It had to be someone that knew assembly code I would
think. This was pretty much before the known compilers and interpreters
were available like they are today.

Perhaps it was produced by someone reading this very message!!!!!
Hmmm......

Don McKenzie  spam_OUTdonTakeThisOuTspamdontronics.com http://www.dontronics.com

Don's Download Dungeon:   http://www.dontronics.com/download.html
Australian Electronics Ring http://www.dontronics.com/aering.html
Win $500USD Cash. Micro design contest:  http://www.simmstick.com

1999\05\07@040418 by Benjamin Petersen

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> Around 1993, when I was possibly one of the very few people that knew
> what a PIC micro was in Australia, the local Victorian Police Forensic
Hmmmmmmmmm
> dept. contacted me and showed me a portion of a home etched
> PCB and what
[cut]
> The interesting part was that it had been used as a timing device in a
> police station bombing. Now why in the world would anyone use a 54 for
> something that you could easily achieve with a simple timer, or 555
> circuit?
> Why etch a board? It had to be someone that knew assembly code I would

Yes why ?

> Perhaps it was produced by someone reading this very message!!!!!
> Hmmm......
>
> Don McKenzie  .....donKILLspamspam@spam@dontronics.com http://www.dontronics.com
> Don's Download Dungeon:   http://www.dontronics.com/download.html
> Don's Bomb Section:       http://www.dontronics.com/bomb.html
Hint    ^^^^

<G>
Regards
Benjamin Petersen

1999\05\07@042538 by Don McKenzie

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Benjamin Petersen wrote:
{Quote hidden}

At least you can't accuse me of missing an opportunity:
Don's Bomb Section:       http://www.dontronics.com/bomb.html

Thanks Benjamin :-)

1999\05\07@054422 by Benjamin Petersen

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> > > Don's Bomb Section:       http://www.dontronics.com/bomb.html
> > Hint    ^^^^
>
> > <G>
> > Regards
> > Benjamin Petersen
>
> At least you can't accuse me of missing an opportunity:
> Don's Bomb Section:       http://www.dontronics.com/bomb.html
>
> Thanks Benjamin :-)

You can always pay me by sending me one of your nice boards :-)

Regards

Benjamin Petersen
Toftebjergvej 30
DK-2970 Hoersholm
Denmark

1999\05\07@095736 by paulb

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Don McKenzie wrote:

> At least you can't accuse me of missing an opportunity:
> Don's Bomb Section:       http://www.dontronics.com/bomb.html

 No.  Looks kinda interesting.  Trace missing to DIN socket, but that's
a minor matter.  Surprised the display will fit over the top of the DIN
socket though, and would expect a mini-DIN socket to be a better option.

 Let's face it, nowadays it's not worth it to use an old keyboard for
such a project when new ones come in at $AUS13 or better, and when you
get a new one, you get a PS/2 type, 'cause that's what the ATX machines
use.

 I like the RJ-45 "daisy chain" arrangement with wiring that will work
interchangably/ intermixed with RJ-12.  Cute trick that, using RJ-12
type plugs in either RJ-12 or RJ-45 sockets!

 Shouldn't R8 return to +12 rather than VCC?
--
 Cheers,
       Paul B.

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