Hi Leonardo, Your experience is valuable, of course. Can you advance some information?: Your PC software was written in what? C, VB, ??? It was easy to interface the FTDI DLL modules? Tell us about the difficult parts of the implementation? What Windows version are you using? Thank you, Wagner. ----- Original Message ----- From: "Leonardo Perretti" To: Sent: Friday, December 20, 2002 9:38 AM Subject: Re: [PIC]: USB interface chip experience? I have just built and tested a prototype system based on 18C442 and FTDI FT245, (as implemented in USBMOD2 from gigatechnology (www.gigatechnology.com)). I have provided the 442 with a simple general purpose "operating system", that receives command codes from the USB channel and jumps to predefined routines. If you think it could be of interest, feel free to ask. Greetings from Italy Leonardo Perretti -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.