From: Vladimir.K (gogol101_at_yahoo.com)
Date: 2001-08-10 16:54:32
*************************************************
Model I
- take excellent Joerg's gameportEEG
- add Schmitt Trigger based on NE555 , clean up input signal
and square output signal ( we are interesting only for dominant
frequency )
- multiply frequency by let say 128
- put signal to headphones
Model II
- same as Model I, but:
- operate separately with left and right phone channel
- shift left phone channel about input frequency plus next 0.5 - 1 Hz
so we have now binaural beat frequency
- there is also switch for adding or taking away 0.5 or 1 Hz frequency
so we can train encreasing or decreasing brain waves.
- put input frequency also to light googles
Model III
First two models are factually L/S machine. Model III is different.
- take excellent Joerg's gameportEEG
- add Schmitt Trigger based on NE555 , clean up input signal
and square output signal ( we are interesting only for dominant
frequency )
- detect input frequency for ( 20, 15, 12, 9, 7, 5 Hz)
by let say LM567
- play tone( for diferrent frequency dif. tone) for let say 5 s after
detection input frequency
- duration of tone could be adjustable
******************************************************************
Criticisim, improvement and schematic design are welcome.
Vladimir
(gogol101)
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:32 BST