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Brain Wave Machine (LM7805)

2017-04-19 13:39  
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This article describes the Brain Wave Machine (LM7805). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: LM7805. 

Humans have been using light and sound to achieve altered
states of consciousness for thousands of years. Primitive
cultures used flickering fires and rythmic drumming to induce
these altered states. Today, you can choose from a wide variety
of electronic brain-wave machines which use light and/or sound to
alter brain-wave activity. Brain-wave activity ranges
from fully awake to deep dreamless sleep. This activity is
categorized into five primary groups: Delta, Theta, Alpha, Beta,
and Gamma.

By using light and sound to induce these brain states we are
able to gain greater control and efficiency of brain usage.
Furthermore, improvements in relaxation, memory, creativity,
stress management, sleep disorders, and even ESP(!) can be had by
utilizing a brain-wave machine.

Commercial brain-wave machines cost hundreds of dollars, but
you can build your own using only a few dollars worth of
components. In this document I will walk you through hardware
construction and softw1are control of an easy to build brain-wave
machine.

Disclaimer: I am not an electronics expert or a biofeedback
specialist. If you fry your hardware (or your wetw1are) don`t
come whining (or drooling) to me. I assume no responsibility for
what you do with this information.

Building the Hardware

With simplicity being the goal, brain-wave goggles can be
constructed from suitable eyewear, such as safety glasses, and an
array of LED`s (Light Emitting Diodes). I`m using the PC`s
parallel port to control the flashrate of the LED`s. Audio
stimulation can be provided by a stereo and headphones or the
PC`s soundcard.

I`m using 8 LED`s, one per parallel port data out line. This
provides an easy way to control each individual LED allowing for
some variations in pattern and intensity. Each lense on the
goggles will hold four LED`s in a diamond pattern. The LED`s are
powered by the parallel port and controlled via softw1are.

Basic electronics experience is recommended but not necessary to construct this brain-wave machine.

Parts List

8 LED`s (choose green, yellow, or red LED`s)
DB25 pin male parallel port connector (or butcher a printer cable)
Goggles (safety glasses or similar eyewear)
Wire

Circuit Diagram

Construction

Drill four holes in each lense in a diamond pattern as shown
in the diagram to the right. Make the holes just large enough for
the LED`s to fit through.

Glue the LED`s into the holes. Be sure there is room betw1een
the LED`s and your face when you are wearing the goggles.
Actually, the LED`s fit tightly in 3/16″ holes and I didn`t need
to use glue.

Wire all of the LED`s cathode leads together and connect (with
a long wire) to a ground pin on the parallel port connector.
Pins 18-25 are all ground so pick any one of those. Note: the
flat side of the LED is the cathode lead.

Connect the LED`s anode leads to the parallel port connector.
Follow the circuit diagram above which outlines which parallel
port pin to connect each LED to. Use long wires, you are going to
want to be lying down when you use the goggles. (If you are
using a printer cable you can use a battery and a LED to figure
out which pin each wire is attached to.)

If your parallel port wires aren`t already in a bundle tie
them together with wire-ties so they don`t get tangled. You will
also want to provide strain-relief by attaching the wire bundle
to the goggles so it doesn`t get pulled off.