Cell phone-Based Device Control With

Voice Acknowledgement An Industry Oriented Mini project

Abstraction Submitted by

M. Rupa Sree (09NA1A0420)

T. Indrani (09NA1A0438)

L. Srilatha (09NA1A0448)

T. Krishnaveni (09NA1A0466)

M. Siva Prasad (09NA1A0483)

Under the guidance of

Mr.S.Ram Kumar, M.Tech.

Assistant Professor

Department of Electronics and Communication Engineering

LINGAYAS INSTITUTE OF MANAGEMENT AND TECHNOLOGY

(Approved by AICTE, New Delhi & Affiliated to JNTUK, Kakinada)

Viveka Nagar, Madalavarigudem, via Nunna, Vijayawada.

2012 – 2013

ABSTRACT

Here is a circuit that lets you operate your home appliances like lights and water pump from your office or any other remote place. So if you forgot to switch off the lights or other appliances while going out, it helps you to turn off the appliance with your cell phone. Your cell phone works as the remote control for your home appliances. You can control the desired appliance by pressing the corresponding key. The system also gives you voice acknowledgement of the appliance status

Recording and playback:

For playback of any device status, open SPST switch S19 and press the corresponding switch (S9 through S16). The recorded audio can be heard from the speaker connected to pins 14 and 15 of IC2.

Software:

The program (Device_Control.BAS) for the microcontroller is written using BASCOM microcontroller programming software. In the program, first, initialize the port (P0-P3) for corresponding controls. Thereafter, declare the variables for the program. After declaration, assign some initial value to variables. Here, microcontroller ports are initialized to make all the devices ‘off’ initially.

After that, the main function checks through ‘Do’ loop which control source has been enabled by using DIP switch pins. If you select switch S17, it searches the input from the mobile only. If you select switch S18, it searches the input from the switches (S1 through S8) only. If you enable both switch S17 and switch S18, it searches the inputs from switches and mobile. Else, the rest-status LED1 glows.

If you press ‘*’ key followed by the device number on your mobile handset, it will not change the status of that device and inform the current device status. If you press the device number followed by ‘*’ key on your mobile handset, it will change the status of that device and inform the changed device status. ‘#’ key controls the voice control subroutine and acts like a mute key. Power supply circuit description:

The 230V AC main is stepped down by transformer X1 to deliver the secondary output of 9V, 500 mA. The transformer output is rectified by a full-wave bridge rectifier comprising diodes D1 through D4, filtered by capacitor C16 and then regulated by IC 7806 (IC5). Capacitor C15 bypasses the ripples present in the regulated 6V power supply. LED3 acts as a power-on indicator and resistor R16 limits the current through LED3.

Hardware Platform : Microcontroller

Software Platform : BASCOM-AVR compiler

Category : Embedded System

Under the guidance of: Mini Project Associates:

Mr.S.Ram Kumar, M.Tech. M. RupaSree (09NA1A0420) Assistant Professor T. Indrani (09NA1A0438)

L. Srilatha (09NA1A0448)

T. Krishnaveni (09NA1A0466)

M. Siva Prasad (09NA1A0483)

Power supply circuit:

PROPOSED CIRCUIT DIAGRAM: