Martin C.'s build of the "4069 Brain Stimulator"

I've added a 1m ohm pot to the electrode because when I tested it with the multimeter and oscilloscope I found out that the final output, at the electrode, was building up to 1200 millivolt!

So, there's a pot for the frequency (2hz to ultrasound), another one for the output level, and an on-off switch. The electrodes are made of felt over a shim (0.006 inch thick) of brass welded to the wire. I use standard "salinex" (salt water "nose cleaner"). Here's the little windows program I use to get an oscilloscope out of my pc, using the sound card.

Martin C.

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