Function: Step-down (buck) DC-DC converter for reducing higher input voltage to a stable lower output voltage.

Regulator IC: Built around the LM2596 switching regulator IC.

Input Voltage: 4V to 40V DC.

Output Voltage: Adjustable from 1.25V to 37V DC (with onboard multi-turn potentiometer).

Output Current: Up to 2A continuous (peak up to 3A with proper heat dissipation).

Efficiency: High conversion efficiency, typically 75–90% depending on input-output conditions.

Switching Frequency: ~150 kHz fixed frequency operation.

Features:

• Over-temperature and short-circuit protection.

• Onboard voltage adjustment knob.

• LED indicator (on some module versions).

Applications: Ideal for Arduino, Raspberry Pi, ESP32, battery charging, LED drivers, robotics, and general DC power supply regulation.