Page 91 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

FIGURE 4-8 Using Invoke to add power-supply pins.

These pins then can be explicitly connected to the appropriate power nets. Note that ICs such as
this will have specific net names associated with the power pins, so you do not have to connect them

up explicitly as long as you pay attention to the ERC results to make sure that the power nets are all
defined correctly.

Dimension

This command adds dimension labels. There is no reason to do this in a schematic diagram.

Nets

Aside from the components themselves, nets are the most important part of any design. When you are

drawing a schematic, you will use nets to connect one component lead to another. This may be done
directly or by connecting a net from one lead of a component to a net that already exists on the
diagram.
Let’s create a few nets, see how they get named, and see what happens when we connect one net
to another. Start by adding four resistors and a net between R1 and R2 and also between R3 and R4

(Figure 4-9).