Product Description

MT8870 DTMF Decoder Voice Decoding Module Phone Remote Control Board LED Indicators With Pins and Audio Cable


Specifications:

Onboard Complex Frequency Decoder IC MT8870D

Onboard 5 LED indicators for easy viewing output state 

Universal 2.54mm pin 

DC Power Supply Voltage : 5V(4.5V-5.5V)

Operating Temperature : -40-+85 °C

IO Drive : Current Maximum 10mA.

PCB Size : 25.4x25.4MM

This decoding module is for mobile and fixed telephone voice dialing decoding function

Designed specifically for ARDUIUO(UNO MEGA2560 etc) Board.also use   for Breadboard MCU( C8051 C51 ZIGBEE CC2530  AVR PIC MSP430 STM32 STM8  ARM Xilinx Altera Lattice FPGA/CPLD)

Does not require any wiring, can be inserted directly into the UNO/MEGA2560/DUE board to use.

12 Digital outputs decode mobile and fixed telephone keys (0,1,2,3,4,5,6,7,8,9, * #).Another 4 Digital output(A,B,C,D) can use "DTMF Dial" PC Software control.

Dial-up -> A4 A3 A2 A1

Dial 1   -> 0 0 0 1

dial 2    -> 0 0 1 0

Dial 3   -> 0 0 1 1

Dial 4   -> 0 1 0 0

Dial 5   -> 0 1 0 1

Dial 6   -> 0 1 1 0

Dial 7   -> 0 1 1 1

Dial 8   -> 1 0 0 0

Dial 9   -> 1 0 0 1

Dial 0   -> 1 0 1 0

Dial *   -> 1 0 1 1

Dial #   -> 1 1 0 0

Dial A  -> 1 1 0 1

Dial B  -> 1 1 1 0

Dial C  -> 1 1 1 1

Dial D  -> 0 0 0 0

Arduiuo uno/mega2560 Code fragment:

After purchase, please contact me for complete code!

//*******************************************//

#include

int STD = A0;

int Q1 = A1;

int Q2 = A2;

int Q3 = A3;

int Q4 = A4;

....

//Check once every 5 ms

void dtmf_decode(void)

{

....

}

void setup()

{

.....

}

void loop()

{

//Complete the decoding

if(Decod_finished)

{

Decod_finished = 0;

Serial.print(" Activate : " );

switch(Q_dat){

case 1 : Serial.print("1 \n" ); break;

case 2 : Serial.print("2 \n" ); break;

case 3 : Serial.print("3 \n" ); break;

case 4 : Serial.print("4 \n" ); break;

case 5 : Serial.print("5 \n" ); break;

case 6 : Serial.print("6 \n" ); break;

case 7 : Serial.print("7 \n" ); break;

case 8 : Serial.print("8 \n" ); break;

case 9 : Serial.print("9 \n" ); break;

case 10 : Serial.print("0 \n" ); break;

case 11 : Serial.print("* \n" ); break;

case 12 : Serial.print("# \n" ); break;

....

}

.....

//****************************************************************************//


Note:

1. Due to the light and screen difference, the item's color may be slightly different from the pictures.

2. Please allow 1-3cm differences due to manual measurement.


Package includes:

1x MT8870 DTMF Voice Decoding Module

1x 50cm Male to Male Audio Cable ( 3.5mm Jack )






Welcome to our store!
 
We are a professional worldwide wholesale company, with our own factory located in China.
 
We supply many products including video game, health & beauty, phone accessories, computers accessories, camera & camcorder,car accessories, Clothing accessories, games, toys & hobbies, jewelry, antique & craftwork. High product quality,reasonable prices, excellent customer service and a reliable credit standing is our tenet.
We accept PayPal only.
 
Payment must be received in 7 business days of auction closing.
 
Please leave note for your special request (e.g. Colors or Size) in PayPal when you pay the order.
 
Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched.
  • Item will be shipped out within 48 hours upon receipt of your payment.
  • The shipping time details, please read the shipping and delivery together with the price.
  • We ship to your PayPal address. Please make sure your PayPal address is correct before you pay.
  • Considering the cost of business and easy shipping, usually the item is packed in retail packaging.

CountryShipping Time

Working Days + Saturday 
+ Sunday

5-78-1516-2021-2526-30>31
United StatesRate(item arrived)5.1%50.1%29.6%10.5%4.7%Refund
United KingdomRate(item arrived)9.9%63.2%19.1%3.4%4.4%Refund
AustraliaRate(item arrived)21.4%50.0%14.3%7.2%7.1%Refund
FranceRate(item arrived)10.5%28.6%43.8%10.1%7.0%Refund
GermanyRate(item arrived)11.1%22.2%30.3%20.9%15.5%Refund
CanadaRate(item arrived)0.0%47.1%31.4%17.6%3.9%Refund
SpainRate(item arrived)3.7%24.1%48.2%13.8%10.2%Refund
If this item is defective upon receipt, customer has up to 14 days from date of receipt for exchange of a new one.But buyers should be pay for the shipping charge for returning.
 
We care about our valued customers, and are always willing to work things out. If you have any problems, please e-mail us immediately.
If you have any questions, please feel free to send eBay message to us, our service specialists 24 Hours a Day, 7 Days a Week (maybe there is some delay in weekends).
 
Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem.
 
Please DON'T leave negative or neutral feedback if you haven't received item in 30 days, because we have mentioned the shipping time repeatedly.
About Us
Welcome to our store!
 
We are a professional worldwide wholesale company, with our own factory located in China.
 
We supply many products including video game, health & beauty, phone accessories, computers accessories, camera & camcorder,car accessories, Clothing accessories, games, toys & hobbies, jewelry, antique & craftwork. High product quality,reasonable prices, excellent customer service and a reliable credit standing is our tenet.
Payment
We accept PayPal only.
 
Payment must be received in 7 business days of auction closing.
 
Please leave note for your special request (e.g. Colors or Size) in PayPal when you pay the order.
 
Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched.
Shipping
  • Item will be shipped out within 48 hours upon receipt of your payment.
  • The shipping time details, please read the shipping and delivery together with the price.
  • We ship to your PayPal address. Please make sure your PayPal address is correct before you pay.
  • Considering the cost of business and easy shipping, usually the item is packed in retail packaging.

CountryShipping Time

Working Days + Saturday 
+ Sunday

5-78-1516-2021-2526-30>31
United StatesRate(item arrived)5.1%50.1%29.6%10.5%4.7%Refund
United KingdomRate(item arrived)9.9%63.2%19.1%3.4%4.4%Refund
AustraliaRate(item arrived)21.4%50.0%14.3%7.2%7.1%Refund
FranceRate(item arrived)10.5%28.6%43.8%10.1%7.0%Refund
GermanyRate(item arrived)11.1%22.2%30.3%20.9%15.5%Refund
CanadaRate(item arrived)0.0%47.1%31.4%17.6%3.9%Refund
SpainRate(item arrived)3.7%24.1%48.2%13.8%10.2%Refund
Terms
If this item is defective upon receipt, customer has up to 14 days from date of receipt for exchange of a new one.But buyers should be pay for the shipping charge for returning.
 
We care about our valued customers, and are always willing to work things out. If you have any problems, please e-mail us immediately.
Contact Us
If you have any questions, please feel free to send eBay message to us, our service specialists 24 Hours a Day, 7 Days a Week (maybe there is some delay in weekends).
 
Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem.
 
Please DON'T leave negative or neutral feedback if you haven't received item in 30 days, because we have mentioned the shipping time repeatedly.