Cell Phone based DTMF Controlled Garage Door Opening System

  • Cell Phone based DTMF Controlled Garage Door Opening System

Cell Phone based DTMF Controlled Garage Door Opening System

Product Description

The main objective of this project is to unlock a garage door by a mobile phone using a unique password entered through the keypad of the phone. Opening and closing of garage doors involves human labor. In this proposed system, the opening and closing of a garage door is achieved by using a mobile phone.

The owner can call to a mobile phone interfaced to the system which in turn is connected to the garage door that can open/close the door by entering the password. This method is very convenient as one doesn’t have to get down of his car to open/close the door physically.

This project is based on the concept of DTMF (dual tone multi - frequency). Every numeric button on the keypad of a mobile phone generates a unique frequency when pressed. These frequencies are decoded by the DTMF decoder IC at the receiving end which is fed to the microcontroller.

If this decoded values (password entered by the user) matches with the password stored in the microcontroller, then the microcontroller initiates a mechanism to door opening system  through a motor driver interface.

Further this project can be incorporated with an EEPROM i.e., a non-volatile memory so that the password can be changed by the owner.

Project Highlights

  • Easy to use, Self-explanatory kit.
  • All-inclusive solution kit.
  • Extensive audio-visuals available.
  • Branding-free material.
  • Pre-programmed Microcontroller.
  • Call/mail for Tech Support from 10 am - 7 pm.
  • Can be Customized for Arduino, Raspberry Pi, PIC

Block Diagram

Hardware Requirements

  • 8051 series Microcontroller
  • DTMF Decoder
  • Resistors
  • crystal
  • Capacitors
  • Diodes
  • Transformer
  • Voltage regulator
  • Motor Driver IC
  • DC Motor with sliding mechanism

Software Requirements

  • Keil compiler
  • Language: Embedded C or Assembly

Get 100% Assured Successful Results

A simple and effective plan that assures you the best scores, a plan that gives you time to read, learn, practically experience the whole workings of your project and create a successful unit you can proudly showcase. And the best part is this… even if your own project unit malfunctions... you will still have a ready-made project unit for yourself, just in case there is a last minute issue that you or your teammates could not solve. Confused? Well let me explain.

Plan A: Create A Successful Project Model By Yourself

Plan B: Have A Expertly-Made & Quality-Tested Replica Of Your Project For Assured Results

So here’s how it works.

In my engineering days, we used to struggle replicating a PCB model from our text books with real tools. We had a tough time with the circuits and most of the time - they used to fail. So I wanted to solve this problem not just for myself but for all my fellow students like you. Young, energetic and knowledgeable youth who really want to learn but still cannot afford to fail with the project because it matters and the colleges rarely help us out productively.

So I want to give you a beautiful DIY model of the project that also includes:

  1. A Complete set of tools, circuit diagrams, tested PCD, zero board, audiovisuals and everything else you will need to execute your project to perfection.
  2. A ready-made unit of the project itself, so that you can actually see, test and learn in real-time and if by any chance you could not complete the unit by yourself - can submit this unit for an assured first-class score.

Sounds like a dream? Well, yes it is and here’s how you can benefit from this project not just in your final year but also help you with your interviews and in the future too.

User Reviews


"I live in Hyderabad, a place that is known for engineering colleges. Went with frnd and bought a set from Ameerpet(tht hs rdymade stuff like this) and it failed just b4 viva. Thats when we got this thx to a senior who is sorta like a geek.. and let me tell u.. Its one reason why me and my frnds got thru the final sem. Works great and is useful too later.. "

Ravi Teja
Order No: HYF1290

"A must-buy. It helped me practice in real time and learn how to make a project by looking at an actual workable unit. (fyi - you get a fully built unit and another full set of components to build another by yourself) so it was great value for us. We shared the costs by 3 (our team for the project) but i got to keep my unit as the other two kept the original. Showed it for my on-campus and got thru too becuase it not just looked neat and profesionally bt worked great later. (still have it in my room, now working with GE in Bangalore) "

Order No: BLR2933

"We have used it for our institution - it is available in lab and has been good for explaining various models in live during class. Strongly suggest every college dept to have it for labs as it is working well - even with regular use at lab for more than 1 year. Note:We got the unit complementarity before launch in 2014 and have later purchased few batches. The team behind it is professional and know what electronics students need and i am writing this review on their request on 13/05/2016"

Mr. Ramesh Kumar Jha
Order No: BQF3698


Q:  Which microcontroller is used in this project?

A:  A 40 pin microcontroller from 8051 family is used in this project.

Q:  What is DTMF based garage door opening system?

A:  DTMF based garage door opening is controlling the movement of garage door through DTMF tones from cell phone.

Q:  How is a real door demonstrated in this system?

A:  As a sample, a CD loader demonstrates an actual door

Q:  Can one use it with landline?

A:  Yes it can be used with landline phone

Q:  Can it be used with mobile phones?

A:  Yes it can be used

Q:  What is DTMF?

A:  DTMF or Dual tone multi frequency is a signaling system which uses a combination of two frequency tones to represent a key pressed on the keyboard of any cell phone.

Q:  What is the DTMF IC used?

A:  IC 8870 is the DTMF IC used.

Q:  What is the formula for calculating smoothing capacitor value?

A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.

Q:  Why my phone is not working for the project while it works with other phones?

A:  The dialing tones generated by a phone forms as an input to the project for proper working. While some phones develop exact DTMF tones even before establishing a call while pressing the numbers, some other phones develop a flat tone for any number pressed. Besides the same, some phones the internal speakeroutput is not disabled owing to some specific setting enacted by the user. In these cases directly dialing through chord connection shall not work. However if a call is initiated to the dialed number mobile which is interfaced to the project it will work (provided the connector is not loose) as DTMF tones are compulsorily made available to the receiver from the exchange ,as all our IVRS works on those kind of tones. Therefore,if the project does not work by direct wire connection please try by dialing the number from any other phone. In order to be doubly confirmed make sure that while one inserts the pin to the cell phone the speaker gets disconnected failing which it is not going to work because the tones are sent to the project board only if the speaker of the cell phone is disabled.

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