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microcontroller and RTC based bell controler with an LCD

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7@rB

7@rB

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hello everybody,
I have to design the above project, the main goal is to have a bell controller but in addition I want my system to be based on a RTC and the bell should rings according to a predefined specific times although I have to represent the current time with an LCD. Any help?
 

Do you have to use any particular microcontroller?

Some of the Microchip PIC range have a built-in RTC circuit, so you don't have to make an RTC in software. Something like that would be the easiest solution.
 

this circuit is ds1302 based school bell.
if u interested i will post all details.
timer.jpg
 
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FoxyRick,
I dont have, I am confused for that ! for me, the problem is about the features of my system (LCD, Ethernet interface , bell controlling according to the RTC) , which microships have a built in RTC? do you have an idea if the pic30f2010 include it?


matthai,
thank you, yes I am but I have some questions, what is the use of the switches (sw1,sw2,sw3, and sw4)? what is the function of J4? and u4?
 

You did not mention ethernet before - that makes things more complicated.

For PICs with RTC, go to the link below and click "H/W RTCC" on the right. There are a lot, but not the dsPIC30F2010

**broken link removed**

For Matthai's circuit, let me guess:

The switches are to set the clock time and alarms.
J4 is a jumper to connect the bell.
U4 is an EEPROM to store the programmed alarms.
 
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any help with programming the 8051 chip in the circuit given above by matthai?
 

hi,
i am sending all, including,circuit,pcb,asm & hex files to u.



best wishes
matthai.
 

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thank you dear, really you helped me :)
dear just I want to ask you if it's tested? I am going through it now.
also, can I have the values of the crystal u used in junction with the microcontroller (X2, X1 is sure 32.768Khz) also do u use the 8051 or 8052?, btw does it make a difference?
 

hi 7@rB,
i did this long years back,and also tested.
i was using 89c52.it's only difference is memory,here both will work with some program modification.
crystals x1= 32.768 kHz & x2 =4 MHz.
 
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