LM 2596 buck converter

LM 2596 Brand : Other
Type : Power Transformers
Input: DC 3 V to 40 V .Input voltage must be 1.5 V higher than the output voltage, no boost
Output: DC 1.5 V to 35 V Voltage is continuously adjustable, maximum output current is 3 A
Features: all use solid-state capacitors, 36 u thickening circuit boards
Steps: connect to power source, adjust the swirl button on the blue pad and monitor voltage with multi-meter to get the needed voltage