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Title: Sound operated switch using a simple transistor circuit
Page Link: Sound operated switch using a simple transistor circuit -
Posted By: project topics
Created at: Saturday 24th of April 2010 02:06:59 AM
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Clap Switch
Sound operated switch using a simple transistor circuit
The operation is simple. Clap and the lamp turns on. Clap again and it turns off.
The electret microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. It produces a small electrical signal which is amplified by the succeeding transistor stage. Two transistors cross connected as a bistable multivibrator change state at each signal. One of these transistors drives a heavier transistor which controls a lamp.
I ....etc
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Title: ppt for dtmf decoder connected with mobile phones
Page Link: ppt for dtmf decoder connected with mobile phones -
Posted By:
Created at: Wednesday 24th of August 2016 02:53:19 AM
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Title: Telephony Communication DTMF decoder
Page Link: Telephony Communication DTMF decoder -
Posted By: science projects buddy
Created at: Monday 20th of December 2010 01:26:23 AM
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Telephony Communication
DTMF decoder
This circuit detects the dial tone from a telephone line and decodes the keypad pressed on the remote telephone. two distinct frequency tones make up the DTMF(dual tome multiple frequency), and hence the name. The the dialer and the telephone exchange communicate one way through the DTMF communication.the tone generator and the tone decoder consist of a complete communication setup. In this project, IC MT8870DE is used to decode the input dial tone to the dialled numbers. These digital bits can ....etc
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Title: ppt on mobile controlled home appliances using dtmf decoder
Page Link: ppt on mobile controlled home appliances using dtmf decoder -
Posted By:
Created at: Sunday 14th of October 2012 09:12:11 PM
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hi jkwfrjghsfjkag.asfgaksfgasfgxcvbn fkrjgvfsnv xcmbgfrhgvn ....etc
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Title: controlling robot using dtmf decoder
Page Link: controlling robot using dtmf decoder -
Posted By:
Created at: Wednesday 25th of March 2015 06:17:01 PM
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hi qamar here from pakistan
i just want a complete report of this project.
its not complete here. thanks ....etc
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Title: circuit diagram of home automation with dtmf decoder at89c51 using mobile communication
Page Link: circuit diagram of home automation with dtmf decoder at89c51 using mobile communication -
Posted By:
Created at: Wednesday 03rd of April 2013 01:00:32 PM
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circuit diagram of home automation with dtmf decoder at89c51 using mobile communication
i want to circuit diagram of home automation with dtmf decoder at89c51 using mobile communication and also ppt slides of that ....etc
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Title: home automation using dtmf decoder ppt
Page Link: home automation using dtmf decoder ppt -
Posted By:
Created at: Tuesday 29th of October 2013 10:13:24 PM
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Title: ppt for dtmf decoder connected with mobile phones
Page Link: ppt for dtmf decoder connected with mobile phones -
Posted By:
Created at: Wednesday 24th of August 2016 02:44:46 AM
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Title: simple applications of encoder and decoder
Page Link: simple applications of encoder and decoder -
Posted By:
Created at: Tuesday 03rd of February 2015 04:38:01 AM
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Title: dtmf decoder ic ht9170b interfacing to 8051
Page Link: dtmf decoder ic ht9170b interfacing to 8051 -
Posted By:
Created at: Monday 17th of June 2013 11:05:56 PM
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hello sir,
can you please suggest me how to write a program for dtmf decoder ht9170b interfacing with 8051 micro controller. ....etc
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