Page 52 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards
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FIGURE 2-18 Results of an electrical rule check.
The first thing to note is that only one of the problems listed is an error; the other four are
warnings. The error is because we have left pin 5 of IC1 unconnected. The part specification for pin
5 says that this is not allowed. We could just ignore the error, but checking the datasheet for the 555
timer, it is normal to attach a 10-nF capacitor between pin 5 and ground (GND), so do that now.
Search for “capacitor,” and then find CAP-PTH-SMALL in the Sparkfun CAP section.
Add it, connect it up, and change the value to be 10 nF, and your schematic now should look like
Figure 2-19.
