On 17/01/2011 02:12, Xiaofan Chen wrote: > On Mon, Jan 17, 2011 at 9:48 AM, Tamas Rudnai wr= ote: >> On Mon, Jan 17, 2011 at 1:11 AM, Xiaofan Chen wrote= : >> >>> I do not know of any online based PCB tools. >>> >>> On the other hand, there is at least a widely used web-based EE >>> simulation tool used by many companies, including Microchip. >>> http://web.transim.com/main/ >>> http://www.microchip.com/stellent/idcplg?IdcService=3DSS_GET_PAGE&nodeI= d=3D2534 >> What do need to download if that is web based? > I do not think you need to download anything special. I have not > used the Microchip version. But I have used National Semi's > Webench which is said to be based on Transim, I've used NS web-bench to refine design of PLL using their LMX family.=20 It's very painful compared to a local application and then awkward to=20 add into your project documentation for other or subsequent Engineers.=20 Linear Technolgy approach of offering a Spice download with schematic=20 capture GUI and GUI virtual instruments and large number of sample files=20 is far better. NS does have a separate tool which you can download which calculates the=20 various registers for the LMX family and can even use a simply made=20 parallel to I2C adaptor to control the Chip. That 2nd tool doesn't help=20 with design of loop filters. NS would be far better to hire someone to write a decent local=20 application, even if in Java to promote their LMX PLL. The Web-bench is=20 pretty nasty. Maybe I'll do it myself. Though maybe not in Java. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .