> Stuart Brorson wrote: > > I am one of the folks who thinks that component symbols should not > > have hidden pin connections. Indeed, this problem is really acute > > when the symbols live in a library, since newbies won't know that the > > pin is connected to GND unless they open up the symbol and look at the > > attributes.
> As long as you do standard stuff, for example a uC circuit w/ > +5V and GND only, everything is fine. Heh. You've illustrated my point very well. +5V logic supplies havn't been "standard" for a number of years. Logic supply voltages are all over the place now. +3.3V is arguably more common than +5V logic (for commercial-grade designs), and +2.5, 1.8V, and 1.5V are also seen. Therefore, I don't favor "out of the box" symbols to have hidden +5V supplies. > If there would be all those > power supply pins, IMHO it would be a real mess. Granted, it is a mess. Therefore, I prefer to let experts draw their own symbols with the power net connections embedded, if that's what it takes to clean up the mess. But I don't think that the "out of the box" symbols should have hidden power -- or GND -- connections. It's just too easy for the unaware to get bitten by this. Stuart
