# Where do electrons go after reaching GND in this Arduino Mega design?

When examining the EAGLE file for the Arduino Mega that I downloaded from their official website, I noticed that the ground (GND) is not connected to anything other than the C4 component, which means electrons flows from +5V through the C4 component into the GND.

When I look at the actual board, I see that the GND is indeed only connected to the C4 component and has no path connected to anything else at all.

Does that mean when I plug in the Arduino board to a power source, the electrons from +5V just start piling up at where GND is, since there is not an outlet for it? Won't there come a point where there are so many electrons piling up at GND that electrons at GND start repelling the electrons flowing from +5V, and the circuit just stops working?

• as shown here this circuit would ineed not work. I don't have the files myself, but I assume that either this ground connection goes to an internal ground plane not shown, or this is an error. – Joren Vaes Mar 19 '18 at 7:57
• May the electrons go to electron heaven or it doesn't exist because there are more than 2 layers and there are some misunderstandings. – Sunnyskyguy EE75 Mar 19 '18 at 8:07
• 10/10 it's missing a GND copper pour – MrGerber Mar 19 '18 at 8:15
• Did you run the ratsnest command to render the pours? – Wesley Lee Mar 19 '18 at 8:43
• Just for correctness' sake: Physically the electrons go from the ground plane to +5V (not vice versa). – Nikolai Ruhe Mar 19 '18 at 9:54

Remember: $V = \int\frac{I}{C}dt$