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hey i have to give a presentation about the working of microcontroller in train announcement system . i just have a block diagram which has a buzzer,rf cardreader and a voice chip interfaced to 8051. does anyone have the circuit diagram or detailed explaination or the source code for it, it would help me a lot. (this is the announcement system used in trains to announce the next station to the passengers inside the train and not the one used in platforms)
There are no "the circuit diagram" or "the source code".
A number of companies have developed their own different solutions that they sell. Do you think that they put up the schematics and source code for their commercially developed products on the web? Wouldn't that possibly affect their chances to sell their products?
By the way: A presentation of how a microcontroller can be used in a train announcement system do not require any source code or schematics. All it would need is that you create a block schema outlining the different modules in such a system and that you are well-read enough that you can present the information and answer any questions.
Or was "presentation about the working of..." not a good summary of your project, and you was tasked by implementing a working demo system?
I found following websites for literature of electronics amd micro- controller. Please visit and share your knowledge there, if possible.
for digital signal processing: signalinfo.blogspot.com/
For PIC micro-controller and projects
http://picinf.blogspot.com/
for 8051 micro-controller and projects microcontroller51.blogspot.com/
regards.