fun semi-related EE design fact that readers may find interesting: one of the fastest ways to tell that someone didn't know what they're doing when they design

fun semi-related EE design fact that readers may find interesting: one of the fastest ways to tell that someone didn't know what they're doing when they designed a board is that they placed the oscillator anywhere other than right next to the component it drives. the traces that connect the oscillator to the component are basically an antenna - the longer they are, the stronger they broadcast. This becomes an issue when there are multiple oscillators in close proximity - their broadcasts can interfere with each other and cause them to synchronize. I forget what this effect is called but here's a neat video that kinda illustrates it: https://www.youtube.com/watch?v=kqFc4wriBvE&feature=kp https://www.youtube.com/watch?v=kqFc4wriBvE&feature=kp