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From: "Reg Edwards"
Subject: Re: Wanted : A device that shows our brain activities
Date: Sat, 7 Dec 2002 02:25:11 +0000 (UTC)
Organization: Private individual
NNTP-Posting-Date: Sat, 7 Dec 2002 02:25:11 +0000 (UTC)
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Use a pair of BC109's to make a twin, balanced input, common emitter
amplifier. Collector currents = 20 or 30 microamps. Follow by a 1 or
2-stage BC109 amplifier. Followed by a single-beam scope.
Use a 9V battery for the DC supply of the transistor amplifier.
Take low-frequency response down to 1 or 2 Hz. Put in a 30 Hz low-pass
filter. Put in a 50 Hz (or 60 Hz) power-frequency rejection filter.
Shave you head using 3-hole blades. Use salt-water and super-glue to attach
electrodes (coins) to scalp.
Sit in a 6 feet mu-metal cube, Screen and ground everything in sight.
Sit in front of the scope. Ground your ankle. Try not to move a muscle.
Think as hard as you can.
Works better on detection of heart muscle potentials. Use alligator clips
Regards from Reg G4FGQ
For Free Radio Design Software
Go to http://www.g4fgq.com
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