Crystals, usually quartz, possess the piezoelectric effect. Mechanical stress causes charge generation, and an electric field leads to mechanical vibration. They have a stable natural vibration frequency. Oscillators are circuits turning DC power into periodic electrical signals, leveraging crystals’ properties or other principles.
They’re vital in electronics. In digital circuits like MPUs and MCUs, they supply clock signals for coordinated operations. In wireless comms, they generate high – frequency carriers for signal transmission. Electronic measuring instruments rely on them as frequency references for accurate measurements. Also, combined with counters, they enable timing functions in devices, useful for tasks like timed operations in smart homes and industrial automation.