Every chip needs a clock – and that clock comes from a tiny piece of quartz. In this video, we dive straight into the piezoelectric effect, the feedback loop, and how a crystal oscillator generates the high‑frequency square wave that drives your CPU, microcontroller, or smartphone. No fluff – just the core physics and engineering behind the "heart" of electronics. Perfect for anyone who wants to understand how timing works in digital systems.

🔍 Key topics: quartz vibration, piezoelectricity, amplifier feedback, startup noise, square wave shaping.