Standalone power supply module with adjustable voltage from 3.0 to 40 V, and selectable ranges of 1.5–35 V. Key features - Thickened, advanced PCB for high reliability and robust performance - Short-circuit protection and over-temperature protection for safe operation - High conversion efficiency and an easy-to-use adjustment control to optimize energy use and enhance device functionality Attributes and benefits - Function: precisely adjustable output to support diverse electronic projects and tests - Compatibility: suitable for a wide range of devices and development setups that require flexible voltage rails - Reliability: reinforced PCB construction with built-in safety protections - Performance: efficient energy conversion for reduced waste and cooler operation Use scenarios - Prototyping and powering microcontroller boards, sensors, and small electronics that need adjustable voltages - Laboratory testing and troubleshooting of circuits by supplying stable, configurable voltage - DIY electronics projects and demonstrations that benefit from a simple, adjustable power source Note: All specifications follow the original ranges and protections described, without added features.