projek circuit diagram?

Are you working from PCB layout drawings, or reverse-engineering an existing PCB assembly? Do you have a parts list identifying the components?

More information, please.

When you copy the board, just remember not to include the original company's trademark.

Aaaa... reverse engineering! I remember that! When you need badly to know what and how a circuit is doing, and you do not have a schematic, you make a big pot of coffee and start to do a job for which you will mention, in your native language, all the relatives of the designer.

It would help to have a xerox copy of both sides (you might be out of luck if it has four layers or more). After that start in one corner, follow a trace, on both sides, note all parts connected to that trace, and draw whatever schematic grows. Mark in red, on your xerox copies, the finished traces. It helps, if a traces goes from one side to the other, to stick a thin wire in the via where it happens.

After the first draw, you have to "descifre" the real schematic, to mark the values etc...

For most of consumer devices, for $25 you can get a complete set of drawings, for professional ones, a service manual could cost you some $100 - $200. So, if you consider that you might work many hours to reverse engineer your pcb, see how much you evaluate the worth of your work hour.

to convert your pcb diagrame in to a ckt dia frist you should put your pcb ckt on a graph paper then you shold try to make more simpler in order to understand it. if your pcb is compplicated one then you should make small parts of your pcb based on the bases of ckt connection by taking one component at atime and then putting it on the ghaph paper by its orignal smbol and thren analysis it . do same with other

to make your ckt connection more sequenced you shold design your pcb with the help of different software present in the market .