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