Electronic – Eagle – How to attach a pin not shown on schematic symbol

cadeagleschematics

In Eagle, I would like to include SN74HC595 shift registers in my project. I found a library online a few months ago (can't find source anymore) that has this part.

The symbol looks like this:

enter image description here

However, I noticed the symbol does not have power and ground pins, which is contrary to all of the other devices I've seen and created before. I had no idea how I would actually connect it to the same power supply I'm using for all other components in my schematic.

So I opened up the device in the library, and it looks like this:

enter image description here

It seems there's a second symbol (on the left) that goes only to VCC and GND, and those are assigned to the relevant power and GND pads on the package.

My issue is that my power rails on my schematic are labeled '5V' and 'GND'. I've read that I can 'simply' rename the 'VCC' pin to '5V' and that it will automatically connect to any '5V' net in whatever schematic I put it in. This, however, didn't work.

I've also consulted Eagle's awful product support pages to no avail.

How do I hook this component up to my '5V' line?

[ note: GND hooks up automatically to the 'GND' net in my schematic ]

Best Answer

"Invoke" command resolves this.

enter image description here

I've got only Eagle 5.11.0 in front of me at the moment. But, this haven't changed in 6.3.0

@ScottSeidman had beat me to the answer, while I was annotating the screenshot.

Related Solutions

Electronic – Eagle PCB: “No Supply for Power Pin …” error

The Electrical Rule Check executes, depending on the pin direction (specified by the author of the schematic symbol), various checks. It expects for the direction of type Pwr a Sup pin set for this net. Sup is a pin type for power supply outputs for ground and supply symbols.

From the Eagle manual:

"[...] For every Pwr-pin there must be at least one pin with the same name but the direction Sup(a supply pin). There must be one on every sheet. These Sup pins are fetched into the schematic in the form of power supply symbols, and are defined as Devices in a library (see supply*.lbr). These Devices do not have a Package, since they do not represent components. [...]"

Further...

"If there is no supply pin in the supply libraries that fits to your voltage in the schematic, you have to define a new supply pin! Renaming an already existing supply pin is the wrong way and can lead to unexpected results!"

Electronic – How to reset all part names in Eagle PCB

There is a ULP script called renumber-sheet.ulp provided in the default Eagle installation for renaming parts; however it renames each prefix starting with 1 (e.g. R1, R2..., C1, C2...) which is not what you want.

There is a script called renumber_by_page.ulp at this location (bottom of the page). It works a little differently, as it renumbers it keeps the part numbers for all parts in sequence regardless of prefix, so it will renumber parts R101, R102, C103, C104 etc. More like what you want but not quite.

But wait, there's more.

Instead of renumbering the parts automatically, it creates a script called rename.scr which looks something like this:

EDIT .s1;
NAME 'BAT1' 'old_BAT1';
NAME 'C1' 'old_C1';
NAME 'C2' 'old_C2';
NAME 'D1' 'old_D1';
NAME 'D2' 'old_D2';
   etc.
EDIT .s1;
NAME 'old_BAT1' 'BAT100';
NAME 'old_C1' 'C101';
NAME 'old_C2' 'C102';
NAME 'old_D1' 'D103';
NAME 'old_D2' 'D104';
   etc.

So before running it, if you edited the prefixes in the second group, e.g. 'C to 'G$, 'D to G$ you would have what you want I think (if I understand your question correctly). This could either be done manually with a text editor, or via a script written in AWK or Python etc.

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