Posted on Leave a comment

Noise Shots X5 Pro wireless Bluetooth earphones

The Noise Shots X5 Pro earphones come with Bluetooth 5.0 for connectivity to devices, it will be launched in India for Rs 4,999.

Continue reading Noise Shots X5 Pro wireless Bluetooth earphones
Advertisements
Posted on Leave a comment

Audio Technica ATH-S100 Headphones

stereo-headphone

Audio technica is famous for its expensive and first-class earphones. The brand recently decided to attract the public. The price of audio technica ath-s100 is 1699 rupees.

Continue reading Audio Technica ATH-S100 Headphones
Posted on Leave a comment

Why are Phones Good But Batteries are Terrible?

A common fact is that cell phones have poor battery life. The curse of the external battery pack will not go away soon.

Continue reading Why are Phones Good But Batteries are Terrible?
Posted on Leave a comment

Hot Apple Iphone Cases Events

There are hot news about iphone cases:

  • 1. Apple may release new smart battery packs to make iPhone 11’s battery life longer
  • 2.First iPhone 11 Pro Max disassembled to confirm 25% battery increase
  • 3.The new iPhone eventually sacrifices thinness to extend battery life
Continue reading Hot Apple Iphone Cases Events
Posted on Leave a comment

How the Shutter Button on the iPhone Smart Battery Box Works

X-rays reveal how the shutter button works on the iPhone Smart Battery Case

Continue reading How the Shutter Button on the iPhone Smart Battery Box Works
Posted on Leave a comment

Xiaomi Mi Robot Vacuum Cleaner to be launched in India

Xiaomi is all set to launch Mi Robot Vacuum, an automatic vacuum cleaner in India tomorrow. The company has made the announcement on its official Twitter handle.

Continue reading Xiaomi Mi Robot Vacuum Cleaner to be launched in India
Posted on Leave a comment

Environmental Protection Mobile Phone Case

Incipio announced today a series of compostable plant Phone Protector and added the growth trend of environment-friendly protective cover.

Continue reading Environmental Protection Mobile Phone Case
Posted on Leave a comment

Top 5 Hot Products of Mobile Phone Case


3Celectrons shop share the popular products of mobile phone accessories, mobile phone protection case, leather case and arm band, to help you understand the popular mobile phone protection case styles and prices, and to make reference for the seller’s selection and pricing.

Fashion Glittering Quicksand Protective Phone Case for iPhone

Fashion Glittering Quicksand Protective Phone Case for iPhone
Fashion Glittering Quicksand Protective Phone Case for iPhone

Fashion Multifunctional Protective Leather Phone Case for iPhone & Samsung Galaxy

This image has an empty alt attribute; its file name is 12577-0609d043f7c2b5ddf41b7cc9897586e0.jpg
Fashion Multifunctional Protective Leather Phone Case for iPhone & Samsung Galaxy

Fashion Protective Bright Plastic Case for iPhone

Fashion Protective Bright Plastic Case for iPhone
Fashion Protective Bright Plastic Case for iPhone
  • Item Type: Phone Case
  • Material: Soft TPU Plastic
  • Compatible Brand: Apple iPhone
  • Compatible Model: iPhone 5/5S/SE, iPhone 6, iPhone 6 Plus, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus
  • Functions: Dirt-Resistant, Anti-Knock
  • Features: Smartphone Accessories, Phone Case, Dirt-Resistant Phone Case, Plastic Phone Case, Phone Case for iPhone
  • Price: $7.95
  • Buy Directly:https://3celectrons.com/product/fashion-protective-bright-plastic-case-for-iphone/

Lovely Floral Patterned Protective Soft Case for iPhone

Lovely Floral Patterned Protective Soft Case for iPhone
Lovely Floral Patterned Protective Soft Case for iPhone

Protective Folding Tablet Case for Samsung

Protective Folding Tablet Case for Samsung
Protective Folding Tablet Case for Samsung
Posted on Leave a comment

MT8870 DTMF Decoder Module Introduction

The MT8870D/MT8870D-1 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code.

What is MT8870 DTMF Decoder Module

The MT8870 based DTMF (Dual Tone Multi-Frequency) decoder module is commonly used to control robots with a mobile phone, it is also used in different kinds of home automation projects where mobile dial pad input is required. This module works as a tone decoder that uses its 3.5 mm audio connector socket to get the input audio signal. It is popularly used for mobile and fixed telephone voice dialing and recording related functions.

MT8870 DTMF Decoder Module
MT8870 DTMF Decoder Module

MT8870 Datasheet

MT8870 DTMF Decoder Module Pinout

Pin NameFunctionComments
Q1Binary Bit 1 
Q2Binary Bit 2 
Q3Binary Bit 3 
Q4Binary Bit 4 
StQDelayed String OutputRepresents Binary Bit 0
StQPower Down Input 
INInhibit InputLogic high inhibits the detection of tones representing characters A, B, C and D
VCCDC Supply Input4.5V – 5.5V (5.0V Nominal)
GNDGround 
MT8870 DTMF Decoder Module Pinout

Features of MT8870 Decoder Module

  • Power Input: 5V Nominal (4.5V – 5.5V)
  • Onboard 3.5mm jack input Facility
  • MT8870 Based Frequency Decoder
  • 5 Channel Interface
  • Detects 0-9, A-D, *, #
  • LED notifier for Output state
  • 2.54” Pin pitch
  • Board Dimension: 37 x 25 x 12 mm (l x w x h)

Note: Complete technical details on MT8870 Decoder IC can be found in the MT8870 Datasheet linked at the bottom of this page.

Alternative for MT8870: There are not many alternatives for MT8870, you can try SSI202 and M957 but they are no longer in production.

MT8870 DTMF Decoder Module – Overview

DTMF is usually found in tone based dial devices, such as cell phones or telephone dials. When the dial is pressed, it produces a combination of two separate sine waves, a unique frequency signal that can be decoded and produced as a binary output. DTMF module based on MT8870 has the same function. By checking the binary output it is easy to identify the button pressed. Binary output can be generated by obtaining audio input from 0-9 numbers, A-D letters, * and # symbols. The important components on the MT8870 DTMF module are shown below.

The binary output digits are available on the output pin Q1 to the pin Q4. In this module, there are onboard LEDs that can be very useful to identify the output state signal of the binary pins.

The DTMF module has a 3.5 mm audio input Jack that can be easily connected with a mobile phone by using a 3.5mm audio jack. It is very useful to add dual-tone multi-frequency decoding in any microcontroller based projects.

MT8870 Interfacing diagram

MT8870-Interfacing-Diagram
MT8870-Interfacing-Diagram

DTMF decoder modules can be interfaced with any kind of microcontroller like PIC, Arduino, etc. It requires 4 digital I/O pins to be interfaced with the 4 binary bit output pins. It also requires a 5 volt supply to the power of the module. In the below diagram, a simple interfacing example is shown where a generic microcontroller unit is shown.

MT8807 Application

  • 1. Wired Robot control via mobile phone keypad.
  • 2. Home Automation
  • 3. Security Systems

That’s all for today. Hope you enjoyed this article. However, if you have doubts or have any questions about this, you can contact me in the comments section below. I’ll be happy to help you as best I can. Let us know your feedback and suggestions at any time, they allow us to provide you with high-quality work that responds to your needs and expectations, and helps you continue to give back to our products. Thank you for reading this article.

Posted on Leave a comment

MWC in Barcelona: GSMA

This year MWC event was canceled in February after several major exhibitors withdrew due to the outbreak of the Novel Coronavirus across the globe.

Continue reading MWC in Barcelona: GSMA