Page 53 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

FIGURE 2-19 Schematic with capacitor for pin 5 added.

Close the “ERC” window, and run it again. Just the four warnings should remain. The last two of
these just say that the LEDs do not have a value. We can either ignore these warnings or add a value
of say Red to indicate the color of the LEDs.

This just leaves us with two warnings. They will say something like POWER pin IC1 GND
connected to N$6. The N$6 probably will be different because it depends on the order in
which you connected things together. N$6 is an automatically assigned name for a net. A net is, if you
like, a line, and all the lines that connect to it between one component pin and another.

The warning is there because IC1 expects its GND pin to be connected to a net called GND, but
my ground net is called N$6. You can discover the names of your nets by clicking on the “Show” icon
in the “Tools” menu (at the top; it looks like an eye). Clicking on a net will then highlight it and show
you its name in the status area at the bottom of the screen (Figure 2-20).