![]() But no source code, so not a chance of fixing bugs now that Ivex is no longer in business. with not limits on pins or traces or layers. Ivex was okay, but the company went out of business and offered a "last chance" purchase of WinDraft, WinBoard, SPICE, etc. A maintenance subscription was out of the question. I didn't like PADS because it replaced the Windows OS with its own OS when it ran. I used it just once, for an entrepreneurial product, and billed the cost to the customer. The PADS program was purchased in the 1990s and delivered on 3.5" floppy disks with a dongle. I may obtain KiCAD in the near future because (1) its free and (2) my free trial of EAGLE expired before I could do anything with it. That said, I have only owned three PCB circuit design tools: PADS (Mentor Graphics), Ivex (now defunct), and now EAGLE. But if you make a production-floor change, substitute a part for example, it is nice to have that propagate backwards to the schematic and to the Bill of Materials. All of them are forward-linked: change the schematic, change the board traces. ![]() It is best to purchase a program with integrated schematic capture that is backwards-linked to the PCB layout function. The more expensive programs do a lot of housekeeping for you and may have better "automatic" wire routers. They ALL require climbing a steep learning curve.
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