welcome to Canton-Electronics Store
MT8870 DTMF Voice Decoder Module Telephone Module for Arduino UNO MEGA2560 NANO
  • MT8870 DTMF Voice Decoder Module Telephone Module for Arduino UNO MEGA2560 NANO
  • MT8870 DTMF Voice Decoder Module Telephone Module for Arduino UNO MEGA2560 NANO

MT8870 DTMF Voice Decoder Module Telephone Module for Arduino UNO MEGA2560 NANO

  • Model: CE005
  • Shipping Weight: 0.03Kg
  • 9966 Units in Stock

USD $3.99

  • Product Description
  • Shop Confidence
  • Shipping & Return
  • Customer Reviews
Module No.:  CE005
We also have:
"Multifunction 16Ch MT8870 DTMF Audio Decoder",click here
 " 12Ch MT8870 DTMF Audio Decoder",click here  
Package :(Does not include Arduino UNO/MEGA2560):
1 PCS MT8870 DTMF decoder module;
1 PCS Male to Male audio wire (3.5mm jack ) ;
 photo CE005_10_zps09c9e781.jpg
Onboard Complex Frequency Decoder IC MT8870DS
Onboard 5 LED indicators for easy viewing output state


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 ARDUINO Board.also use for other MCU(AVR PIC MSP430 STM32 ARM7/9/10/11 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 (0-9, * #).Another 4 Digital output(ABCD) can use "DTMF Dial" Software control.
Arduino uno/mega2560 Code fragment:
After purchase, please contact me for complete code!


#include <FlexiTimer2.h>
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
Decod_finished = 0;
Serial.print(" Activate : " );
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;
case 13 : Serial.print("A n" ); break;
case 14 : Serial.print("B n" ); break;
case 15 : Serial.print("C n" ); break;
default : Serial.print("D n" ); break;
 photo CE005_13_zpsd7a5fba3.jpg
 photo CE005_7_zps8441142f.jpg

Typical application for Mobile phones((Does not include Arduino UNO/MEGA2560):

 photo CE005_9_zpsef65b8a9.jpg
 photo CE005_15_zpsa30d9c70.jpg


Typical application for DTMF Dial Software:
 photo CE005_14_zps0dbb2c21.jpg
 photo CE005_11_zps4541ab84.jpg  
Introduction for Shenzhen Canton-electronics Trading Co.,Ltd :
We specialize in RF Wireless Radio Transmitting Units and Receiving Units, the product include transmitters with case, receivers with relay(s), transmittng modules and receiving modules, are widely applied in RC toy, remote sensing, telemetry, fireworks, industrial control, home&garden application.
Normally shipping is by Airmail from China Post Air Mail or Hong Kong Post Air Mail ,15-60 days shipping time based on different country .
Express is available, shipping time is 2-7 days all over the world, and telephone number is needed. Please contact us first for extra payment .
The Best Prices. By working with Canton-electronics Ltd, you can take advantage of the internet business, cut off the wholesalers cost and other costs, and import your products directly from the manufacturer at incredible prices.
Prompt Delivery. Most units are in stock all the time, standard units will be completed within 1-3 days if they are sold out, it is great help for you if your project must be completed before deadline.
Prompt Service. Mails will be replied within 24 hours We work 6 days  a week.
★Return Policy
All mails will be replied to within 24 hours except on weekend and holidays.
Every item is manufactured under Strict Quality-Assurance Guidelines. If you are dissatisfied for any reason, please return the product to us, and we'll refund your money(not  including  shipping fees).
Please ensure that return items are not used.
Return items must be Posted within 7 days of receipt.
Please inform us via email before posting your return package.
•We accept PayPal only. 
•We only ship item to your PayPal verified address. 
•Payment must be received within 3 Days from the date of purchase. 
•Please leave note in PayPal when making the payment if you have any special request (colors/size).
Orders will be processed instantly and dispatched in same day normally, so we do NOT accept any Email/Message note before or after you place orders. 
★Import tax : 
 We will dispatch the item as SAMPLE or GIFT ,  label the total amount on the custom declare invoice .
 Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to buying.


Online Security
All transactions are secured. The website is provided with an SSL encryption system to protect personal and payment data. We do not sell or ship any items ordered through the Site directly to anyone we know to be under the age of 18. We will not collect and personally identifiable information (e.g. name, address, telephone number and e-mail address), also referred to herein as "personal information", about you unless you provide it to us voluntarily.

Items can be returned for a refund or exchange within 60 days of the date of purchase. But the reason for returns caused by yourself (eg, size, color you choose), cannot be accepted. Special circumstances may require partnership with corporate business partners. For more information, please contact our customer service. We shall ship the items via DHL or USPS Once your order is processed you will receive email notification with shipment tracking number. All delivery standards begin when you receive this email. If order is placed after 3:00 PM CST on Friday or on the weekend, the earliest it will ship is Monday.