DTMF Shield

Brand: RoboShop

Product Code: A017

Reward Points: 1

Availability: In Stock

Price: Rs. 150.00
Price in reward points: 100
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Description:

Now-a-days  DTMF  Technology  is  very  popular  because  this  technology  gives  us  freedom  to remotely  control  devices  through  mobile  phone.  This  DTMF  Shield  is  based  on  DTMF Technology,  by  using  this  shield  you  can  control  your  devices  from  a  long  distance.  And  this shield cab easily interfaced with microcontroller. DTMF Shield can connect with phone through audio  jack  (3.5mm).  Many  other  features  like  Low  power  consumption,  Adjustable  guard  time, internal gain setting amplifier, Power down mode, Small size, and high performance.

         This  DTMF  Shield  is  comfortable  with  microcontroller  boards  like  8051,  Arduino,  PIC  etc.        This  shield  sends  4  bit  of  DATA  as  OUTPUT  and  takes  input  from  mobile  phone  connected through  3.5mm audio  jack.  DTMF  (DUAL TONE  MULTIPLE  FREQUENCY)  shield  is  based  on MT8870D IC which is a DTMF receiver that has two sections one is band split filter and other is digital  decoder.  Band split  filter  performs  the  separation of  low  and  high  group  tones  while  the digital decoder decodes all 16 DTMF tones pairs in to 4 bit code. DTMF IC simply generates two frequencies  corresponding  to  a  single  number  pressed  on  keypad.  The  frequencies  which  are generated corresponding to a given number are shown in figure 1.These high and low group of frequencies are specific because at these frequencies the losses are very less.

  DTMF  receive  DATA  from  Mobile  phone  and  it  convert  into  TTL  Level  signal  so  that microcontroller  can  process  these  signals.  As  per  requirement  in  our  project  we  program  our microcontroller  and  do  our  task.  This  Shield  makes  very  easy  to  make  any  project  related  to DTMF  technology.  This  shield  can  be  use  in  different  areas  like  Mobile/telephone  controlled robot, Telephone answering machine, Paging system, Credit card system, Mobile radio etc.

Technical Specifications:
  • MT8870 Decoder IC.
  • 4 Output digital pins.
  • Operates on 5V 
  • Includes MT8870 DTMF Receiver IC
  • Receives and Converts Standard DTMF Codes
  • Remotely Switch Devices from Anywhere Using the Phone
  • Easily Connects to Most Microcontrollers or Roboduino Board
  • Low Power Consumption
  • 5 On-Board LED's For Data Received Indication
  • Standard Header Connections for Control System Connection


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