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Arduino Uno R3

Arduino UNO in Bangladesh The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller.

Price BDT 399
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Arduino Stackable DTMF Shield
  • Arduino Stackable DTMF Shield
  • Arduino Stackable DTMF Shield
  • Arduino Stackable DTMF Shield
  • Arduino Stackable DTMF Shield

Arduino Stackable DTMF Shield

Arduino stackable Dual-tone multi-frequency
signaling (DTMF) shield is used for 
telecommunicationsignaling over analog
 telephone lines in the voice-frequency band
 between telephone handsets
BDT 450
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In-Stock

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Description

Arduino Stackable DTMF Shield

Arduino stackable Dual-tone multi-frequency signaling (DTMF) shield is used for
telecommunication signaling over analog telephone lines in the voice-frequency
band between telephone handsets and other communications devices and the switching
center.The version of DTMF that is used in push-button telephonesfor tone dialing
is known as Touch-Tone. This dtmf shield provides the same interface of touch tones
to be controlled with any open source microcontroller. One of the easiest methods
of automated radio control makes use of DTMF.

 

Features:

  • Operating Voltage: 5v, Current draw: 3mA
  • Input signal range: 27.5 to 869mVrms  (-29 to 1dBm )
  • Trim pot for easy gain adjustment.
  • 3.5mm stereo audio jack (TRS) and 0.1″ standard interface headers
  • Easy to reconfigure the audio jack pinout
  • LED to indicate tone decoded


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