Re: Help needed for microcontroller based project.

In article <1136647750.522989.5500@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
adam <adam.mashraqui@xxxxxxxxx> wrote:
[....]
>AT89C52/AT89S52: MICROCONTROLLER
>DS1307: RTC
>MAX232/MAX485: LEVEL CONVERTER
>AT24C1024: SERIAL EEPROM
>4051B: 8:1 ANALOG MUX
>IC 741/ LM324: COMPARATOR


I suggest an LT1081 for the MAX232, they are easier to get.

If you are comparing I suggest you use a comparitor like the LM339 and not
an op-amp like the LM324.

Don't trust the AT89C52's data *** on the subject of in place
programing. If you are using that one, buy a programmer. The Philips
parts that can be programmed via the RS-232 may be a better option for
you.


Add a 1N4005 diode and an LM7805 or the like to your list so that you have
inverse protection and local regulation. It is much safer to do than rely
on an external supply being set right.

[....]
>We are in the stage of preparing the circuit diagram and there are many
>doubts which occur. We would like you to suggest software for
>preparing schematics and layout. Is there some software available which
>directly converts schematic to layout? Please give names.

I've hear people say they like Eagle for this purpose.
www.eagle.com I think.

>The next challenge is the software side. In our syllabus we have learnt
>C/C++. Since you have mastered this, please guide us how to write the
>programs and routines and recommend compliers, simulators and other
>software related to programming. Are programs and codes available on
>net? If yes, Please give the resource locations or websites.

The Keil stuff is fairly good but it cost money. A few free ones are on
the web. Try google. Also feed "8051" and "free" into google.


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