09-10-2012, 12:11 AM
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cell phone based street light controlling system project pdf
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07-07-2015, 01:35 PM
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07-07-2015, 02:11 PM
cell phone based street light controlling system project pdf
Abstract:
The project works on the principle of DTMF tone command so received from any phone to remotely switch any set o street lights. In roads, the street lights are spread over a large area and thus, operating these lights is a very tiresome and difficult task. Keeping this problems in mind, the proposed system has been designed which uses DTMF technology to control the street Lights remotely.
In order to achieve this, one cell phone will send digitized commands to another cell phone which is in auto answering mode at the receiving end. The receiving cell phone codes are converted into digital commands by using a DTMF Decoder, it will identify the key frequency and convert that frequency to digital codes which are then fed to a programmable microcontroller of 8051 family, as per the sent commands from the senders mobile the microcontroller will send signals to actuate the street lights by making Relays on for every each command send by u sender mobile these relays are actuated by a relay driver ULN2003.
The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier and it is then regulated to +5V using a voltage regulator 7805 which is required for the operation of the microcontroller and other components.
Abstract:
The project works on the principle of DTMF tone command so received from any phone to remotely switch any set o street lights. In roads, the street lights are spread over a large area and thus, operating these lights is a very tiresome and difficult task. Keeping this problems in mind, the proposed system has been designed which uses DTMF technology to control the street Lights remotely.
In order to achieve this, one cell phone will send digitized commands to another cell phone which is in auto answering mode at the receiving end. The receiving cell phone codes are converted into digital commands by using a DTMF Decoder, it will identify the key frequency and convert that frequency to digital codes which are then fed to a programmable microcontroller of 8051 family, as per the sent commands from the senders mobile the microcontroller will send signals to actuate the street lights by making Relays on for every each command send by u sender mobile these relays are actuated by a relay driver ULN2003.
The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier and it is then regulated to +5V using a voltage regulator 7805 which is required for the operation of the microcontroller and other components.
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