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)
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.