Photo-Acustic Brain Stimulator
founder:	ruza
depends on:	Mitch Altman workshop
interested:	harvie
software license:	CC BY-SA 2.5v
hardware license:

~~META: status = completed &relation firstimage = :project:brainmachine-brm.jpg ~~

DIY Brainmachine, Brainwave stimulator, Binaural generator, PsychoWalkman - Device for inducing altered statesof mind including

• Deep relaxation
• Increased awareness
• Better performance memory
• Affecting neural connections between hemispheres
• Dream-like states

Soldered by ruza at Mitch Altman workshop. It works! :) These images showed variant where LED diods are mounted from inner side of the glasses emiting light into the space before eyes. Next step was turn LEDs reversed (emiting light against closed eyes). Visual results are stronger but could be evaluted by experimental subjecs beeing too agresive even for closed eyes.

Ideas on follow-up investigation and experiments with this equipment are welcome.

vysfoePdiik

• http://blog.makezine.com/archive/2007/05/hack_your_brain_make_vide.html
• http://makezine.com/10/brainwave/
• http://wealoneonearth.blogspot.com/2010/05/do-it-yourself-trip-visor.html
• Note that it all may be one big auto-suggestion as this article suggests. czestmyr

• http://makezine.com/images/10/SLMschematic.pdf
  • Atmel, ATtiny2313

/*
The hardware for this project is very simple:
     ATtiny2313 has 20 pins:
       pin 1   connects to serial port programming circuitry
       pin 10  ground
       pin 12  PB0 - Left eye LED1
       pin 13  PB1 - Right eye LED1
       pin 14  OC0A - Left ear speaker (base-frequency)
       pin 15  OC1A - Right ear speaker (Offset Frequencies for binaural beats)
       pin 17  connects to serial port programming circuitry
       pin 18  connects to serial port programming circuitry
       pin 19  connects to serial port programming circuitry
       pin 20  +3v
    All other pins are unused
 
    This firmware requires that the clock frequency of the ATtiny
      is the default that it is shipped with:  8.0MHz
*/

Table of values for meditation
start with lots of Beta (awake / conscious)
Add Alpha (dreamy / trancy to connect with subconscious Theta that'll be coming up)
reduce Beta (less conscious)
start adding Theta (more subconscious)
pulse in some Delta (creativity)
and then reverse the above to come up refreshed

vim slm.c:
 
  struct brainwaveElement {
  char bwType;  // 'a' for Alpha, 'b' for Beta, 't' for Theta, or 'd' for Delta ('0' signifies last entry in table
  unsigned long int bwDuration;  // Duration of this Brainwave Type (divide by 10,000 to get seconds)
} const brainwaveTab[] PROGMEM = {
  { 'b', 600000 },
  { 'a', 100000 },
  { 'b', 200000 },
  { 'a', 150000 },
  { 'b', 150000 },
  { 'a', 200000 },
  { 'b', 100000 },
  { 'a', 300000 },
  { 'b',  50000 },
  { 'a', 600000 },
  { 't', 100000 },
  { 'a', 300000 },
  { 't', 200000 },
  { 'a', 300000 },
  { 't', 300000 },
  { 'a', 150000 },
  { 't', 600000 },
  { 'a', 150000 },
  { 'b',  10000 },
  { 'a', 150000 },
  { 't', 600000 },
  { 'd',  10000 },
  { 't', 100000 },
  { 'd',  10000 },
  { 't', 100000 },
  { 'd',  10000 },
  { 't', 300000 },
  { 'a', 150000 },
  { 'b',  10000 },
  { 'a', 150000 },
  { 't', 300000 },
  { 'a', 150000 },
  { 'b',  10000 },
  { 'a', 200000 },
  { 'b',  50000 },
  { 'a', 200000 },
  { 'b', 150000 },
  { 'a', 150000 },
  { 'b', 200000 },
  { 'a', 100000 },
  { 'b', 250000 },
  { 'a',  50000 },
  { 'b', 600000 },
  { '0',      0 }
};

ruza@azur:~/slm$ avrdude -p attiny2313 -P /dev/ttyUSB3 -c dasa -U flash:w:slm.hex
 
avrdude: AVR device initialized and ready to accept instructions
 
Reading | ################################################## | 100% 0.30s
 
avrdude: Device signature = 0x1e910a
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "slm.hex"
avrdude: input file slm.hex auto detected as Intel Hex
avrdude: writing flash (880 bytes):
 
Writing | ################################################## | 100% 88.24s
 
avrdude: 880 bytes of flash written
avrdude: verifying flash memory against slm.hex:
avrdude: load data flash data from input file slm.hex:
avrdude: input file slm.hex auto detected as Intel Hex
avrdude: input file slm.hex contains 880 bytes
avrdude: reading on-chip flash data:
 
Reading | ################################################## | 100% 85.58s
 
avrdude: verifying ...
avrdude: 880 bytes of flash verified
 
avrdude: safemode: Fuses OK
 
avrdude done.  Thank you.

• http://makezine.com/images/10/SLMfirmware.pdf
• http://github.com/Harvie/Programs/blob/master/c/dreammachine/strobe.c (use your computer as strobe)