Small transformers are electrical devices that change the voltage of alternating current (AC) electricity. They are commonly used in various applications, such as powering electronic devices, charging batteries, and in power distribution systems. By stepping up or stepping down voltage, small transformers help ensure that electrical devices receive the appropriate voltage for safe and efficient operation. These transformers are typically compact and lightweight, making them suitable for use in household appliances, computers, and telecommunications equipment. Their design allows for easy integration into circuits, providing essential voltage regulation and isolation to protect sensitive components from electrical surges.