XL6009 DC to DC Boost Converter 3.0-30V to 5-35V Step-up Transformer Power Module, Pack of 6

The XL6009 module is a non-isolated step-up voltage converter featuring adjustable output voltage and new generation (XL6009E1 core chip) high-frequency (400KHZ) switching technique; its performance is much better than LM2577. Designed for multiple practical applications that need a boost voltage, such as DIY an output-adjustable mobile power supply, temporarily setting up a power supply outdoors, charging your electronic devices, etc.
Input Voltage: DC 3V to 30V (optimum working voltage range is 5V to 30V).
Output Voltage: DC 5V to 35V (continuously adjustable), maximum output current is 4A. Ultra-compact power module with simple operation. Using a mini screwdriver to step up / down output voltage by turning the slotted screw on the blue trimpot, and monitor voltage with a multimeter to achieve the expected voltage; clockwise to reduce voltage and counterclockwise to increase voltage. (1 circle means +/- 1V)