DTMF Controlled Robotic Vehicle Project

DTMF Controlled Robotic Vehicle Project

DTMF Based Robotic Vehicle

Previously we have robotic vehicles use RF circuits, which have the drawbacks of limited working range, limited control and limited frequency range. To solve this problem we provides DTMF based  robotic vehicle system It provides the advantages of robotic control, intrusion free controllers and also robust control, minimal interference and a large working range.

This system involves four different phases: perception, action, processing and detection. In the perception stage if the mobile attached to the vehicle receives a call, then the pressing key on the mobile decodes the generated DTMF tone. Then, the decoder chip receives the audio signal from the mobile, and then converts the DTMF tone into a binary code, which is then fed to the microcontroller. 

Block diagram:

The major building blocks are microcontroller, mobile, DTMF Decoder and DC-Motor-driver circuit. The entire system works and is activated by the mobile that makes a call to the mobile attached to the robotic vehicle. If any button is pressed, then DTMF (dual tone multi frequency)  receives the input signal from cell phone and decode it. Then generates 4-bit-digital output of the 8051 microcontroller.

Microcontroller depends upon the code which is generated by the DTMF decoder to move the rover right or left and forward or backward by rotating both DC motors. The DC motor driver receives activating signals from the microcontroller in terms of low or high logic, then it amplifies and rotates two motors in both directions. The output of the microcontroller is not enough to drive the DC motors, so current drivers are necessary for motor rotation.

Hardware requirements:

• AT89c51 Microcontroller
• Mobile Phone
• DTMF Decoder IC MT8870
• DC Motor
• Power Supply

Software Specifications:

• ·       MC Programming Language: Embedded C
• ·       Keil version IDE
• ·       Proteus For Circuit & PCB Designs

DTMF Based Load Home Automation Project

DTMF Based Load Home Automation Project

DTMF Based Load Home Automation

We know that in industries, loads are distributed over large distances, and it is not convenient to operate all those equipment time to time and it is also time to consume. Into day’s highly developing world most of  peoples wants their homes are automated as per increased level of affordability, simplicity  and comfort through the integration of home appliances with smart phone and tablet connectivity.

This project we propose DTMF based Home Automation system that provides the wireless controls various home appliances such as a fan, bulb, AC, TV etc. In DTMF based load control system a mobile is connected to the circuit and each key on cell phone correspond to the device that needs to be activated. The key must be authenticating with desire function. The DTMF decoder is used to identify the user choices and appropriate action is performed.

Block diagram:

This project includes DTMF {dual tone multi frequency} tones are composed of a series of low frequencies for each column of keys and a series of high frequencies for each row of keys. Each pressed key creates a signal that is equal to the sum of the column’s low frequency and the row’s high frequencies. When the signal is sent over the telephone line to the telephone company’s switching center, a DTMF decoder separates the signal back into the two frequencies and passes it along to the recipient’s phone. The DTMF decoder is responsible for doing this for all telephone numbers entered by all callers in its designated area every day.

Here, microcontroller is used as a control unit which gets inputs (instructions, commands) from a mobile keypad to control one appliance. Same key will be used to turn on and off the appliance. Each time we press the same key, the appliance changes its status. After the appropriate tone and password is entered, it is decoded via the DTMF decoder which further translates it into binary values this values are the input to the microcontroller which verifies each tone individually and corresponding output is given at the output terminal. Thus, when the relay drive is activated by the microcontroller, the device either gets ON or is switched OFF as per the requirement.

Hardware Specifications:-

·        8051  Microcontroller

• LED Display
• Power supply
• Relays Driver and relays
• LCD
• DTMF decoder IC(M-8870)
• Home appliances

Software Specifications:-

     ·       MC Programming Language: Embedded C

     ·       Keil version IDE

     ·       Proteus For Circuit &PCB Design

DTMF Based Door Opener System

DTMF Based Door Opener System

DTMF Cell Phone Based Door Opener System

Entry into a residence is still primarily limited to a manual process which involves inserting a key into a bolt and physically moving the locking mechanism. and its required physical involvement of person sometimes it’s too difficult for person with disability to open or close the door also it is not complete secure method if someone finds the key of lock then it is easy to open the door without owner’s permission. so we required the mechanism that develop remote devices and also reduces the human efforts and maintenance cost

So here we are introducing DTMF Cell Phone Based Door Opener System in which door is opened by using mobile phone where users entered the unique password to open/closed the door. To activate the mobile phone unit, the caller has to make a call which is connected to door. Then the user has to enter the password. As the caller enters a specific password, to open the doors If the password is wrongly entered four times in a row, from the interface – an error sound is generated. And thus, security is kept intact because these passwords are known and owned by selected persons only. DTMF frequencies are more practical and less expensive to implement than the other signalling method used by rotary telephones

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Block diagram:

This project includes DTMF {dual tone multi frequency} tones are composed of a series of low frequencies for each column of keys and a series of high frequencies for each row of keys. Each pressed key creates a signal that is equal to the sum of the column’s low frequency and the row’s high frequencies. When the signal is sent over the telephone line to the telephone company’s switching center, a DTMF decoder separates the signal back into the two frequencies and passes it along to the recipient’s phone. The DTMF decoder is responsible for doing this for all telephone numbers entered by all callers in its designated area every day.

When user wants to open the door he need to make a call on mobile which is connected to door. Once the key or password is entered by person it will check with key which is stored in 8085 microcontroller memory if the password is successful, then microcontroller initiates the mechanism to open the door and grant entrance. This automation introduces a form of secure, keyless entry into a residence along with the convenience of a fully responsive security system monitor.

Hardware specification

·        8051 Microcontroller

·        Power supply

·        DTMF decoder circuit

·        Cell phone

Software Specifications 

·       MC Programming Language: Embedded C

·       Keil version IDE

·       Proteus For Circuit &PCB Design

DTMF Based Embedded Electronics projects

DTMF Based Embedded Electronics projects

1. Dtmf Based Long Range spy Robot with Night Vision
2. Dtmf Based Long Range spy Robot with Obstacle Detection
3. Dtmf Based Long Range spy Robot with Metal Detection
4. Dtmf Based Home Automation
5. Dtmf Based Home Automation with Audio acknowledgement
6. Dtmf Cell Phone Based Door Opener
7. Dtmf Remote Vehicle Control Through Cell Phone
8. DTMF Based Cell Phone  based Voting Machine with Audio acknowledgement
9. Dtmf Based Home Security System
10. Dtmf Based Home Security System with Audio acknowledgement
11. DTMF Based Area Load Control System with Audio acknowledgement
12. DTMF Based Area Load Shedding Control System with Audio acknowledgement