88 lines
4.7 KiB
Plaintext
88 lines
4.7 KiB
Plaintext
Here are the schematics to a DTMF decoder:
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-=<Parts List>=-
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C1 .01uf cap S2 momentary, normally open
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C2 47uf cap S3 momentary, normally closed
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C3,C4 .1uf cap IC1 SSI202 DTMF decoder
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R1,R3 4.7K res IC2 5101 256x4 SRAM
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R2 1M res IC3 CD4070, quad XOR
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R4 1K res IC4 74C93, ripple counter
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LED 7segment common cathode IC5 74C48, BCD to 7-segment
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X1 3.579 Mhz colorburst, HC case IC6 78L05, 5v regulator
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S1,S4 SPST switch
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-=<THE MAIN PC BOARD>=-
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+5v
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+5v +5v __|_
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_______| _|_ _|||__|_
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| _____|____ _____|___|___ | 345 16 | ____
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|_|2 5 1|___________|9 17 22 10|_______|7 13|_a| |
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|_|3 18|___________|11 12|_______|1 12|_b| L |
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|_|8 S 17|___________|13 14|_______|2 11|_c| |
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| S 16|___________|15 5 16|_______|6 10|_d| E |
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| I | | 1 | | 9|_e| |
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C1 | 2 | o__+5v | 0 | | 15|_f| D |
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o__||__|9 0 4|__o _|1 1 | | 14|_g|____|
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|| | 2 7|__o |_|2 S | |___8____| |
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o _|14 10|__| |_|3 R | | \
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| | | 15|__| |_|21 A | GND /R4
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GND | |_11_____12| GND |_|18 M | \
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| | R2 | |_|19 | |
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| |--/\/--| |_|8 | ^ o
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| | _ | | |__20___4567__| \ S4
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| |_|| ||_| | | |||| o
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| ||_|| GND | ||||___________ |
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| X1 ___| |||__________ | GND
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| +5v | ||_________ | |
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| _____| | +5v |_________ | | |
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| __|_____|_____ | _|_________ || | |
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| | 13 14 | | | 4 | || | |
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| | | _ | | | 12|_|| | |
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|___|12_>)_)-----11|____| | 7 10|__| | |
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|_|6__ _ | | 4 9|____| |
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_|5__>)_)------4|_________|14 C 13|______|
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+5v |_|3_______ | | 9 8|_|
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|______|2__ _ | 9|___ | 3 |
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\ ___|1__>)_)-- 8|___| | |
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R1/ | |___________7__| | |_1_2____11_|
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\ | | | | | |
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S2 o__|__| | | | | |
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^ _|_ | | +5v | | |
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\ ___C2 | | | | | |
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o__|__________________|______| / | | |
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| \R3 | | |
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GND /____|_| |
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|________o<--o S3
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GND
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-=<voltage regulators>=- (optional)
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^ +5v
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/ _____ _|_
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____o o__|78L05|____o+5v _|_ _|_
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| |_____| C3 ___ ___ C4
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9v | |___|
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| GND |
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(-) GND
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For instructions and details write to: HB Technologies
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PO Box 2771
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Spring Valley CA 91979
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enjoy---
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Dispater
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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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|/ |/ \| |/ \__/NomaD93'
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: v . : ~
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. '
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< Advertisment added using -=Bad Ad=- 1.91 by Troed/Sync. BBS: +46-451-91002 >
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