Device control using Telephone
by Ranjith | November 5th, 2008.IC NE 555 timer:
The NE555 is an integrated circuit that capable of producing accurate timing pulses. This IC is used as a multivibrater. By using this IC we can construct two types of multivibrater, monostable and astable. The monostable multivibrater produces a single pulse when a triggering pulse is applied to its triggering input. The astable multivibrater produces a train of pulses depending on the Resister-Capacitor combination wired around it.
With a monostable operation, the time delay is controlled by one external resistor and one capacitor connected between Vcc-Discharge (R), and Threshold-Ground (C). With an astable operation, the frequency and pulse width are produced by two external resistors and one capacitor connected between Vcc-Discharge (R), Discharge-Threshold (R), and Threshold-Ground (C).
Block diagram of IC NE 555
74154 4-16 line decoder/demultiplexer:
IC 74154 is a 4-16 line decoder, it takes the 4 line BCD input and selects respective output one among the 16 output lines. It is active low output IC so when any output line is selected it is indicated by active low signal, rest of the output lines will remain active high. This 4-line-to-16-line decoder utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are low. The demultiplexing function is performed by using the 4 input lines to address the output line, passing data from one of the strobe inputs with the other strobe input low. When either strobe input is high, all outputs are high. These demultiplexer are ideally suited for implementing high-performance memory decoders.
Figure (G). IC 74154 4-16 line decoder
All inputs are buffered and input clamping diodes are provided to minimize transmission-line effects and thereby simplify system design.
Truth Table:
Truth Table of IC 74154
74126 Tri – State Buffer
This IC is a tri state buffer contains four independent gates each of which performs a non-inverting buffer function. The outputs have the 3-STATE feature. When control signal is at high state, the outputs are nothing but the data present at its input terminals. When control signal is at low state, the outputs are held at high impedance state. So no output will be available at the output terminal.
Figure H. IC 74126
IC 7474 D-flip-flop
IC 7474 is a conventional D-flip-flop IC. This IC consists of two D flip-flops. These flip-flops are used to latch the data that present at its input terminal. Each flip-flop has one data, one clock, one clear, one preset input terminals.
Single D-flip-flop
Seven Segment Decoder:
The DM74LS47 accepts four lines of BCD (8421) input data, generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly. Each segment output is guaranteed to sink 24mA in the ON (LOW) state and withstand 15V in the OFF (HIGH) state with a maximum leakage current of 250 mA. Auxiliary inputs provided blanking, lamp test and cascadable zero-suppression functions.
Figure I. IC 7447 BCD - seven segment decoder
December 17th, 2008 at 5:17 pm
Very good concept. I will try to do this project.
December 17th, 2008 at 5:18 pm
Thank you!
December 18th, 2008 at 4:17 am
hi
this is very good project
thank
December 19th, 2008 at 3:18 pm
iam very much intrested in this project. i want to know mudh more abt this project
December 23rd, 2008 at 5:43 pm
hi
please explain to me about PCO and DPDT
thank
December 30th, 2008 at 12:22 pm
please send me the coding of “Device control using telephone
January 4th, 2009 at 2:05 pm
PLEASE INFORM A CIRCUIT FOR CELL PHONE – DTMF CONTROLLING DEVICES.
January 4th, 2009 at 2:09 pm
REQUEST TO TO SEND ME A CIRCUIT TO WHICH I CAN ATTACH MY GSM/CDMA CELL PHONE TO THE CONTROL UNIT AND AND MAKE CALLS FROM ANY PHONE AND SEND DTMF TONES TO CONTROL 4 OR 8 SWICHES.
January 12th, 2009 at 11:20 pm
i wanna know how i resemble the encoder circuit throgh my remote telephone
January 17th, 2009 at 11:18 am
please send me the coding of thi project or i want to learn how to do this !! i am very much intresten in ur project ! pleae help !!
thnx n regard !
ujjwal kohli
January 28th, 2009 at 6:04 pm
please send me complete info regarding digital ic tester &it is good to do as final year project in b.e. send more project info also.
February 1st, 2009 at 5:43 am
sir have u got any projects on Cell phone controlled devices
March 3rd, 2009 at 6:30 pm
sir i want to know more about this project ,is it work properly?plssss answer …
March 28th, 2009 at 3:48 pm
hi
this is very good project.
i will use this concept in my project.
April 2nd, 2009 at 3:09 pm
please can u tell me how the values of R5 C5 and R6 C6 are to be given because i am right now assembling the circuit but i dont know how to address these values
July 28th, 2009 at 4:02 pm
hello! i watn the fully detali of this project like circuit diagram, componont,discription,blockdiagram.please send me in soft copy in my mail.
July 31st, 2009 at 6:50 pm
can I try this project for ME level?
August 3rd, 2009 at 1:01 pm
hi,i am very much interested in the project of controlling switch using telephone.please send me the detail information.Thank you
August 5th, 2009 at 8:18 pm
hai frnd
u r doing ME ,this project is not suited 4 me level projects,try in embedded systems or in matlab field,if u want more about this project pls mail to ajith_mgkumar@rediffmail.com
August 12th, 2009 at 12:41 am
hello sir/madam
incredible idea. but please send detail circuit diagram and implementation technique, as i want it to submit as my final year project.
looking forward for the response.
August 19th, 2009 at 1:19 am
hello!
i want the fully detali of this project like circuit diagram, componont,discription,blockdiagram.please send me in soft copy in my mail.
plzzz…
i m very thankful to you…
August 21st, 2009 at 10:02 am
is there any law that it violate? because you are trying to connect something in the telephone line… reply asap…
August 26th, 2009 at 12:52 pm
plz give some more projects
August 26th, 2009 at 1:14 pm
i want know that in this project if i want to use a cellphone insted of a telephone how will it work and also how it will connect
send me more detail about this project it’s such a nice concept withou microcontroller
THANKS
September 1st, 2009 at 11:51 am
Hi, I am using KT3170 as the Decoder. Please enlighten me on how do i connect the telephone line to KT3170?
Also can you explain more on this paragraph “A parallel connection from the telephone line is taken and connected it to telephone interfacing circuit using a DPDT switch. When you wish this section is to be work then you switch ON the DPDT switch otherwise your telephone is used for normal calling receiving purpose.”
Really need help on the connection. I got the circuit ready and a normal telephone set ready. But how do i connect the telephone set line to my circuit (To my KT3170)???
Also for testing purpose, do i need to connect all output pins of IC74154 to some appliances or can i just connect few of the output pins and the rest left it unconnected.
Looking forward for your reply, thanks a million in advance!
September 16th, 2009 at 1:25 pm
i want its circuit diagram
September 25th, 2009 at 10:45 am
i want its circuit diagram
October 3rd, 2009 at 11:48 am
sir can u suggest me a circuit through which i can control a toy car using two cell phone one on the car & other on the my hand
October 3rd, 2009 at 11:50 am
i want its circuit diagram
October 13th, 2009 at 8:21 am
send me all d information abt dis project including circuit digrams, etc..
October 30th, 2009 at 1:20 pm
please send me the synophsis of
” appliance control through mobile phone using DTMF”
November 2nd, 2009 at 10:22 pm
i want dis project urgently. how i can get it? pleas reply me fast as possible.
November 9th, 2009 at 4:04 pm
send that software
November 12th, 2009 at 5:38 pm
I am very much interested in this project, if possible instead of telephone can it used with mobile, if yes what sort of changes are required. Pls send me details including components, circuit diagram , software. Pls reply immediately
November 12th, 2009 at 8:34 pm
plz sens me d ckt. diag. of project
device control using mobile
November 26th, 2009 at 9:22 pm
pls send me the working of this project using microcontroller(device control using telephone)
December 2nd, 2009 at 9:31 am
hi,i am very much interested in the project of controlling switch using telephone.please send me the detail information.Thank you
December 6th, 2009 at 9:37 pm
please provide the circuit diagram
December 9th, 2009 at 1:58 pm
i am very interested in this so may you please provide the circuit diagram please
December 11th, 2009 at 12:29 pm
i am interested in doing this project. may i please have the PCB diagram and the list of components asap. thanks.
December 14th, 2009 at 3:29 pm
hello!
i want the fully detail of this project like circuit diagram, componont,discription,blockdiagram.please send me in soft copy in my mail.as m facing interws nw..i made same projct in my final year, but nw nt able to explain it as took areadymade projct bcoz of time scarcity..
plzzz…
i m very thankful to you…
December 18th, 2009 at 3:08 pm
hi shall i do this project for my BE level pls rply me and also send me the exact details and wat will be the cost required for doing this project
December 24th, 2009 at 7:32 pm
I have no idea about the use of ic7 555. Can anybody help me to get out of the problem. Hoping for a reply…….vinodquilon@gmail.com
December 27th, 2009 at 6:29 pm
Hi
I need the ful detail of project(Home appliance controller using DTMF) like circuit diagram, componont list ,discription,blockdiagram,equilanant ICs list that used in this project.
please…….. send me a soft copy in my mail as i m facing interview
I m very thankful to you…
December 30th, 2009 at 3:40 pm
hi
I like the concept the very well.I want more information about Ckt dig, Components, synopsis of Device control using Telephone project. waiting for your reply. Thnx in adavnce.
January 24th, 2010 at 5:16 pm
Sir, pls send me a circuit diagram with complete labels on my email.
January 28th, 2010 at 3:15 pm
Sir, pls send me a circuit diagram with complete labels on my email.
January 28th, 2010 at 9:03 pm
respected sir,
can i get the complete circuit diagram with neat labels and the pcb layout of this project?? plz send it to me on my email id.
thank you.
February 1st, 2010 at 11:03 pm
Please send me the coding and circuit diagram of this project.
February 2nd, 2010 at 1:45 pm
Hi
I need the ful detail of project(Home appliance controller using DTMF) like circuit diagram, componont list ,discription,blockdiagram,equilanant ICs list that used in this project.
please…….. send me a soft copy in my mail as i m facing interview
I m very thankful to you…
February 6th, 2010 at 6:32 am
hello!
i want the fully detail of this project like circuit diagram, component,discription,blockdiagram,equilanant ICs list that used in this project and coding.
please……
i m very thankful to you…
February 14th, 2010 at 11:55 am
Great project renjith!!!
February 14th, 2010 at 4:10 pm
pls give circuit diagram device control through telephone. using micro controller IC. IC 89S52
February 20th, 2010 at 7:24 am
pls i would like see the circuit diagram and implementation of the project
March 11th, 2010 at 12:17 pm
it is too good but i want some more inf