29-07-2012, 03:54 PM
hi;
i would like to have some information on the GSM based notice board on .ppt format.
thanks
roodabeh
29-07-2012, 03:54 PM
hi; i would like to have some information on the GSM based notice board on .ppt format. thanks roodabeh
30-07-2012, 11:05 AM
to get information about the topic " GSM based wireless notice board" full report ppt and related topic refer the link bellow
https://seminarproject.net/Thread-sms-ba...bile-phone https://seminarproject.net/Thread-multiu...tice-board https://seminarproject.net/Thread-wirele...ull-report
02-08-2013, 02:29 PM
GSM BASED WIRELESS NOTICE BOARD
GSM BASED WIRELESS.pptx (Size: 397.41 KB / Downloads: 66) INTRODUCTION The main aim of this project will be to design a SMS driven automatic display board which can replace the currently used programmable electronic display. It is proposed to design receiver cum display board which can be programmed from an authorized mobile phone. The message to be displayed is sent through a SMS from an authorized transmitter. The microcontroller receives the SMS, validates the sending Mobile Identification Number (MIN) and displays the desired information. Started off as an instantaneous News display unit, we have improved upon it and tried to take advantage of the computing capabilities of microcontroller. Looking into current trend of information transfer in the campus, it is seen that important notice take time to be displayed in the notice boards. This makes it inefficient for immediate information transfer, and thus the display board loses its importance. The GSM based display board can be used as an add-on to these display boards and make it truly wireless. The system required for the purpose is nothing but a Microcontroller based SMS box. The main components of the kit include microcontroller, GSM modem. These components are integrated with the display board and thus incorporate the wireless features. The GSM modem receives the SMS. The AT commands are serially transferred to the modem through MAX232. In return the modem transmits the stored message through the COM port. Various time division multiplexing techniques have been suggested to make the display boards functionally efficient. Problem formulations: In paper [1] Swiatkowski, M.; Wozniak, K.; Olczyk, Li he used LCD display which is not comfortable for looking from far distance,so we used LED display instead of LCD display. In previous versions the system is having computers which increases the total cost of project and also sysem will be too bulk. Here we used microcontroller(p89c51) . Microcontroller – Philips P89C51RD2BN: Features: • It Can be programmed by the end-user application • 6 clocks per machine cycle operation (standard) • RAM can expandable upto to 64 kB externally. • There are 4 levels of priority interrupt • 8 interrupt sources • Four 8-bit I/O ports • Full-duplex enhanced UART Advantages Framing error detection Automatic address recognition Power supply: Power supply is a reference to a source of electrical power. The whole system of power supply is also called as PSU(Power supply unit). Here in our application we need a 5v DC power supply for all electronics involved in the project. This requires step down transformer, rectifier, voltage regulator, and filter circuit for generation of 5v DC power. GSM modem: A GSM modem is a wireless modem that works with a GSM wireless network. Matrix Simado GDT11 is a Fixed Cellular Terminal (FCT) for data applications. It is a compact and portable terminal that can satisfy various data communication needs over GSM. It can be connected to a computer with the help of a standard RS232C serial port. It is perfect for areas where wired connection is not possible. It finds its applications in IT companies, Banks and Financial Institutions, Logistic Companies, Service Providers, Remote Project Sites, Professionals, and such other business establishments. We will use the At commands for control the modem ,the applications are Reading, writing and deleting SMS messages. Sending SMS messages. Monitoring the signal strength. Monitoring the charging status and charge level of the battery. Reading, writing and searching phone book entries. The number of SMS messages that can be processed by a GSM modem per minute is very less,only about six to ten SMS messages per minute. |
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