tone decoding - results edaboard.com

help decoding 12khz tone?

hi all i need to decode a 12khz tone using grotzel (dft) algorithm can you please show me how to calculate the adc sample rate needed to decode this tone ,and minimum number of samples needed?thanks bobi...
Digital Signal Processing :: 02 Nov 2009 10:14 :: FvM :: Replies: 1 :: Views: 81

a doubt in dtmf decoder-problem

hello, i am working on a dtmf encoder-decoder. i am decoding according to the steps given by my proffesor. for decoding i am supposed to follow these steps:1. dtmf_signal i.e the tone and the sample frequency fs as input.2. fourier transform it usi...
Digital Signal Processing :: 06 Oct 2009 18:26 :: swetha.incore :: Replies: 0 :: Views: 123

dtmf based robotic project

t in which i have to control 3 servo motors and 2 dc motors on a mobile platform. it needs to be controlled in two modes. one is using a mobile phone on the robot which receives commands through dtmf tones from another mobile phone. the second one is...
Microcontrollers :: 30 Apr 2009 14:49 :: Noman Yousaf :: Replies: 8 :: Views: 1392

matlab help needed

hi, i want to make a matlab code for encoding and decoding of touch tone signals anyone who have the code or like to help me in making the code please reply....
Digital Signal Processing :: 26 Sep 2008 22:44 :: mohsin677 :: Replies: 3 :: Views: 309

smart cards

hi all,im looking for technical reports about how smart cards work in detail (block diagram, technologies for data transfer) since i have only general knowledge about it. then i would know if some works about smart cards with embedded global satellit...
Digital communication :: 12 Jun 2008 9:04 :: rooftile :: Replies: 8 :: Views: 780

300 points for good idea

hi friends, i am doing a project wireless text messaging using mobile/landline phonesoftware:the msg.asm program is written in assembly language and compiled using metalink asm51 cross-compiler.hardware:1. there are 2 mobiles used one at the transmit...
Microcontrollers :: 03 May 2008 8:38 :: zuisti :: Replies: 4 :: Views: 1065

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encoding and decoding touch-tone signals

hi, i to have make a matlab code for encoding and decoding touch-tone signals can anyone help or give me matlab code...
Digital Signal Processing :: 10 May 2007 6:57 :: mohsin677 :: Replies: 2 :: Views: 210

speech codec info

hey guyzi want etsi papers for gsm speech codecthanx...
Digital communication :: 25 Mar 2007 0:29 :: Yasser A.Nour :: Replies: 4 :: Views: 540

automatic telephone dialer when triggered

hi people, i want a automatic telephone dialer when triggered circuit diagram. using a microcontroller is best suited and should have a minimum of 2 trigger inputs.thanks in advance,pravardhan...
Electronic Elementary Questions :: 06 Feb 2007 15:20 :: pravardhan :: Replies: 3 :: Views: 201

using cm8870-kt3170's opamp out

my circuit already contains cm8870 for dtmf decoding. i want to use its opamp output to my mcu input for detecting other tones (call back, dial tone etc). is the is it posible? opamp out is about 5vpeak while tone occurs?ps: i dont have scope ...
Professional Hardware and Electronics Design :: 19 May 2006 21:41 :: zolam :: Replies: 4 :: Views: 366

near range ultrasonic communication

dear all,i wanna design an ultrasonic circuit for near range communication. let me refer it as tag at the moment. 2 meter tag-to-tag communication range is what i aim for.there will be a transmitter and a receiver on the tag. i have a referenced ultr...
Hobby Circuits and Small Projects Problems :: 20 Mar 2006 15:09 :: throwaway18 :: Replies: 4 :: Views: 333

ctcss subaudio encoder decoder needed

i search schematich without specialistic ic (ie cml) for encoding and decoding radio transceiver subaudio tone ctcss...
Hobby Circuits and Small Projects Problems :: 16 Nov 2005 18:04 :: koky :: Replies: 0 :: Views: 207

function generator ic?

hiwhat is the available chips for wave generation like as max038?is there new ics with more features?bye...
Hobby Circuits and Small Projects Problems :: 20 Jul 2005 15:43 :: me101424 :: Replies: 8 :: Views: 5374

house alarm systems and the fixed phone line

hello, some of the alarm systems use a phone interface to the main center, so in the case of an alarm event the system can notify the company which provides the service of guarding the object. i am interested if the phone interface inside of sy...
Professional Hardware and Electronics Design :: 16 May 2005 6:36 :: najam696 :: Replies: 28 :: Views: 7666

how to transmit data over 2-wire dc power line ( e.g 5v)

hi,does anybody heard about cicrcuits that can transmit serial data and suply circuits over 1-pair (2-wire only ) power line. ( up to 2400...4800 bd, up to 2000ft. )ive heard about hart protocol, but its industrial one. i want make my own drivers an...
Microcontrollers :: 01 Mar 2005 12:23 :: vdaniel :: Replies: 12 :: Views: 2769

dtmf decoding using 8051

hi alli want to decode dtmf tone by using 8051 ....i read more paper for this object but antill now i cant writer my programeif any one can help me :cry:...
Microcontrollers :: 02 Jun 2003 17:28 :: dacadc :: Replies: 10 :: Views: 1646

looking for a tone encoder and decoder

i am looking for a tone encoder and decoder chip or a modem chip? anyone knows what can i use...
Hobby Circuits and Small Projects Problems :: 06 Apr 2003 23:34 :: Analyzer :: Replies: 1 :: Views: 482

requesting avrlib.zip

does anyone have te avrlib.zip file from http://hubbard.engr.scu.edu/avr/avrlibthe link didnt work.visioneer...
Microcontrollers :: 08 Feb 2003 16:05 :: visioneer :: Replies: 2 :: Views: 4950

looking for circuit for 5 khz tone burst decoding

i am looking for circuit for 5 khz tone burst decoding, any input is welcome,...
Hobby Circuits and Small Projects Problems :: 05 Feb 2003 15:23 :: MonkeyBusiness :: Replies: 2 :: Views: 948

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