I require some help in how i can build a ps2 to rs232 converter circuit. If someone can hendle me some notes?! I have a CCD barcode reader PS/2 and i need to plug it in an RS232 db-9 port.
Converter or adaptor? The adaptors often came with mice packages back in the 1990s and should be plentiful. Most decent computer stores should carry them or you can probably find them at places like MCM Electronics.
As Dean Huster said, pin to pin converters are easy to come by, the only problem I see is if the bar code reader is capable of using a COM port. Some devices cannot comunicate interchangeably. This is also the case for PS/2 and USB.
As suggested, it depends entirely on the device, a PS2 socket is syncronous, and a comport is asyncronous - unless the software is written specifically to automatically detect and use either type, then it won't work (most mice are designed specifically to do so!).