PRODUCT PARAMETERS Product name: LM317 adjustable voltage stabilized power supply Output voltage: 1.25–12V Output current: 200mA Power supply voltage: 220V (Taiwan 110V) Transformer power: 2.5W Power cord length: 1M Output line length: 20MM Shell size: 11.2 × 6.9 × 4MM (L × W × H) Shell material: Transparent plastic shell (fix the upper and lower covers with 4 screws) Circuit board size: 7.2MM × 6.2MM Product weight: 270g

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LM317T Voltage Regulator IC: The core component that provides the adjustable DC output. 12-0-12 Center-Tapped Transformer: Steps down the AC mains voltage to a usable level. Bridge Rectifier Diodes (e.g., 1N5399): Converts the AC from the transformer into pulsating DC. 1000µF Electrolytic Capacitor: Smooths out the pulsating DC from the rectifier to a more stable DC voltage. Potentiometer (5K or 10K): A variable resistor to adjust the output voltage. Resistors: Required for the power indicator LED and other circuit functions. LED Power Indicator: Shows when the power supply is on. Aluminum Heatsink: Essential for dissipating the heat generated by the LM317, especially at higher loads. 0.1µF Ceramic Capacitor: Filters high-frequency noise from the output.