Ceramic Resonator: A ceramic resonator is a piezoelectric device used to generate a stable frequency in electronic circuits. It's commonly used in microcontrollers, clocks, and communication devices. Less expensive and less accurate than quartz crystals, but offers good stability for general applications. Typical frequencies range from kHz to hundreds of MHz. Usually has three pins (input, output, ground) or two pins (resonator only). Requires minimal external components.