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Why do traces on PCB's go back and forth? My first thought was it acts as a delay however the length of it should make the delay unnoticeable, if nearly non-existent. Image of example:

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  • \$\begingroup\$ Not 'cables'. PCB tracks or traces. (I understand that English might not be your first language.) \$\endgroup\$ – Transistor Jan 16 '16 at 12:31
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    \$\begingroup\$ They're used on high-speed boards where trace length can significantly affect the signal timing. Some of the traces wiggle to match their lengths to the other traces (which are originally a little bit longer) to ensure the signals reach the receivers at the same time. \$\endgroup\$ – DerStrom8 Jan 16 '16 at 15:45

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