I think that all is usefull and so must apear in the web.

The proplem will be if everone upload the "my 3580 usefull schematics"

And not only schematics. If someone finds an equivalent IC to max233 in dip6 and for a half price; PLEASE, I WANT KNOW THAT even without any schematic, only a link.

My 0,01$: Let every post but categoriced and if it becomes to a lot of stupid circuits then you can delete one or two categories.