104 lines
4.3 KiB
Plaintext
104 lines
4.3 KiB
Plaintext
This bulletin has been taken from the OSUNY files from 82/83
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PLEASE NOTE THAT THIS BULLETIN IS FOR INFORMATION PURPOSES
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ONLY AND YOU SHOULD NOT ATTEMPT TO BUILD THIS DEVICE FOR
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USE IN ANY FRAUDULENT OR ILLEGAL ACT.
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M R. AMERICA
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KEY
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===
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First a few KEYS to the diagram:
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Cx is capacitor #x Denoted by: ---| |---
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Px is Pot or Variable resistor #x Denoted by :/
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\
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/<--
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\
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Rx is resistor #x Denoted by /\/\/\/\
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SCHEMATICS
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==========
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The XR-2207 chip is a Voltage-Contr olled Oscillator and a 14
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pin device thu s you must be very careful when soldering
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the parts to this device. It is a little dificult to actually draw a
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schematic on a 80 character scren using limited gra phics but will
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give it a try.
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TO GND_____________
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___
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C2 C3 ___
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_||_ |
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| | _____|__9v+
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` ` ` ` ` ` ` |
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---------------- --------------- |
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|7 6 5 4 3 2 1 | |
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| < |
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|8 9 10 11 12 13 14| |
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---------------- --------------- |
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` ` ` ` ` ` ` |
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--| |--------| | |
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|C1 R2 | R1 |
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GND ______|___/\/\/\/\______|_ ____/\/\/\/\______|
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This is a diagram of how to locate the different pins on the chip please
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no tice that pin one is the closest to the n otch on top of the chip. The
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first thing we'll do is to connect power to the chip (remember that you
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need to build two of these to get a complete system) this is accomplished by
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connecting the positive wire of the battery lead to pin 1 one leg of R1 and R2
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is solder to pin 11 the other leg of R1 goes to pin 1 or to the positive of
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the battery. The other leg of R2 goes to ground, C1 goes between pin 10
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and ground.
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The timing capacitor or C2 goes between pins 2 and 3 of the chip
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pins 8 and 9 should be grounded to ground. Pin 14 is the output
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and this is where one leg of C4 (C3 goes on the other VCO) in series with
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R3(the same goes for the other VCO) and to one lead of the speaker.
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The trimmer pots P1 to P10 should be grouped in groups of 5 pots each
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. the way you group it is by soldering one end of the pot to each other
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leaving the wiper and the other end free.
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| This end goes to pin 6 of the chip
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_____________|_____________
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/ / / / /
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\ \ \ \ \
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/<- /<- /<- /<- /<-
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\ | \ | \ | \ | \ |
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/ | / | / | / | / |
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P1 P2 P3 P4 P5
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And finally this is the way each key should be wired.
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diode
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to Px ------>|-----| This is the contact of the
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|--------- \------ key
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to Px ------>|-----| |
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diode |
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-----
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--- Ground
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-
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This may not be the best way to show the schematics but at least it is
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something.
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MR. AMERICA
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NOTE: This is for information ONLY please do not break any laws.
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Please direct any questions to the SYSOP or to Mr. America. |