199 lines
7.1 KiB
Plaintext
199 lines
7.1 KiB
Plaintext
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(word processor parameters LM=8, RM=75, TM=2, BM=2)
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Taken from KeelyNet BBS (214) 324-3501
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Sponsored by Vangard Sciences
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PO BOX 1031
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Mesquite, TX 75150
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There are ABSOLUTELY NO RESTRICTIONS
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on duplicating, publishing or distributing the
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files on KeelyNet except where noted!
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May 28, 1993
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NEUROPH2.ASC
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This file shared with KeelyNet courtesy of Gene Ariani.
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Neurophone plans/parts list
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PARTS - Specific stuff
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QTY Description
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(1) 5 MHz oscillator in 8 pin dip package with following pinout:
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1 - NC 2 + 3 - missing 4 - GND 5 - OUT 6 + 7 - missing
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8 - VCC
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(2) 74LS90 decade counters
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(1) 741 op amp
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(1) 7805 +5V regulator chip (heatsink optional)
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(2) 8 pin dip sockets with following pins removed
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socket 1: 2,3,6,7 socket 2: 8
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(2) 14 pin dip sockets BOTH with 4, 8, 9, 13 removed
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(1) .01uF capacitor
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(1) 10uF capacitor
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(1) 10 ohm resistor
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(3) 10K ohm potentiometers
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(1) 1M ohm potentiometer (wiper and 1 side used, other unused)
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--------------------------------------------------------------------
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Misc. stuff
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(2) piezo buzzers/speakers (NOT fixed frequency type) removed from
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case (VERY carefully)
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2 lead piezos: remove ground (black) lead
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3 lead piezos: short input and feedback leads (red and blue) and
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remove common (black) lead
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CAUTION: piezos break VERY easily and are usually $1.30 a piece.
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9V battery clip (and a few batteries)
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Page 1
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speaker cable
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headphone plug (w/ speaker cable attached to ground and 1 channel)
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misc. wire
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neat little cute case
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printed circuit board as described below
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DESIGN
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The neurophone design listed below has not yet been tested by the
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author. No claims are made here as to the benifits of using such a
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device and the author is NOT responsible for what happens to you if
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you f*** up and fry yourself. I don't believe that will happen since
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you're only using a 9 volt, but in any case, I'm not responsible.
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The scale for this diagram is about 2 spaces down or 4 spaces across
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equals .1" (standard dip lead spacing).
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The symbols used will be: o = dip lead and thru hole
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O = pin 1 of component (plus thru hole)
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x = a pin that SHOULD be pulled
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Ä ³ / \ , etc. = connections
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lettering/numbering = component desig.
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J1a & b = the connections to the headphone plug (1a to ground, 1b to
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signal)
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J2a and J2b are the piezos (connected to the signal wire, otherwise
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OUCH!!! when you turn it on if it works like what I've tried
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out)
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10K ohm pots off of cap from 7490 and J1b adjust where ground is
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relative to the 741 supply. Since the 741 is used in extremely high
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gain mode in order to saturate quickly, thousandths of volts could
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make it saturate, so adjust these to get the best quality signal out.
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1M ohm pot adjusts gain. You might want to leave it and the 10 ohm
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resistor out and adjust the other pots carefully to get the best
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effect.
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The other 10K ohm pot is the offset adjust. Short pins 2+3 and apply
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power to the 741. adjust the pot until you get something close to GND
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out pin 6.
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Page 2
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Enough said? 1 1 1 1 1 1 1
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
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1 /ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\ /ÄÄÄÄÄÄÄÄÄÄÄÄÄ\
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³ ³ ³ ³
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2 O ³ oÄÄ\ OÄÄÄÄ\ o ³ OÄÄÄÄ\ o
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5 MH³z osc ³ ³ ³ ³
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3 x ³ x ³ o ³ x ³ o ³ x
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³ ³ ³ ³ ³ ³ ³
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4 x ³ x ³ oÄ\ \ÄÄÄÄo ³ oÄ\ \ÄÄÄÄo
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³ ³ ³ ³ / ³
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5 o \ÄÄÄÄo ³ x ³ oÄÄ/ /x ³ oÄÄÄO .01uFa
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³ ³ ³ / ³
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6 \ÄÄÄÄÄ\ ÃÄÄÄo ÃÄÄÄÄÄÄÄÄoÄÄ/ /o ÃÄÄÄÄÄÄÄÄo
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³ ³ ³ / ³
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7 O 78o05 oÄÄÄ´ oÄ/ x ³ oÄ/ x
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³ ³ ³ ³ ³ ³ ³
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8 VCoC ³ o ³ o x ³ oÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄO J1a
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³ GN³D 10uF ³ ³ x^
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9 ³ oÄÄÄo \ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ/ o .01uFb
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³ ³ ³ ³
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10 ³ ³ ÃÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄO o o 10K pot
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³ ³ O ³ /ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\ ³ ³
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11 ³ ³ 10 ohm ³ ³ ³ O o o 10K pot
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³ ³ o o o o O ³ ³ ³
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12 ³ ³ ³1 meg ³ \ÄÄÄÄÄÄÄo \ÄÄÄÄÄ/ o J1b
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³J2aO OÄÄÄÄÄÄÄÄÄÄÄÄÄÄ/
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13 ³ \ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo
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³ gain /ÄÄÄÄÄÄÄÄÄÄÄÄÄ\ 10k pot (offset adj.)
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14 ³ adj. ³ 741 \ÄÄo
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³J2boÄÄÄo o o o x
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15 ³ ³ ³ ³
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\ÄÄÄ\ \ÄÄÄÄÄÄÄÄÄ/ /
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16 \ÄÄÄÄÄÄÄÄÄÄÄÄÄ/
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17
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--------------------------------------------------------------------
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If you have comments or other information relating to such topics as
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this paper covers, please upload to KeelyNet or send to the Vangard
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Sciences address as listed on the first page.
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Thank you for your consideration, interest and support.
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Jerry W. Decker.........Ron Barker...........Chuck Henderson
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Vangard Sciences/KeelyNet
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--------------------------------------------------------------------
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If we can be of service, you may contact
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Jerry at (214) 324-8741 or Ron at (214) 242-9346
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--------------------------------------------------------------------
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Page 3
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