The 220V AC to 6V AC 300mA Step-down Transformer is a small power transformer used to reduce the high mains voltage (220V AC) down to a safe, lower voltage (6V AC) suitable for low-power electronic circuits. 🔹 Key Features: Input Voltage (Primary): 220V AC (mains supply) Output Voltage (Secondary): 6V AC (RMS) Current Rating: 300mA (maximum load current) Power Rating: ≈ 1.8W (6V × 0.3A) Type: Step-down transformer (iron-core) Construction: Laminated iron core with copper windings 🔹 Working Principle: When 220V AC is applied to the primary winding, the alternating magnetic field induces a proportional lower voltage in the secondary winding. This module steps down the voltage to 6V AC, which can then be rectified and regulated to obtain DC output using a rectifier and voltage regulator. 🔹 Applications: Power supply for low-voltage circuits (LED drivers, toys, small gadgets). Used in rectifier circuits to produce 5V or 3.3V regulated DC. Educational projects and experiments in basic electronics. Safe isolation from the high-voltage mains supply. 🔹 Example Use in a DC Power Supply: Transformer steps 220V AC → 6V AC. A bridge rectifier converts AC → DC (≈8.5V peak). A filter capacitor smooths the output. A voltage regulator (e.g., 7805) produces stable 5V DC.