This is an LM2596 DC-DC buck converter step-down power module with high-precision potentiometer, capable of driving a load up to 3A max with high efficiency, which can work with UNO, other mainboards and basic modules. When the output current keeps greater than 2.5A (or output power greater than 10W), please add a heat sink on it. switching frequency: 150KHz
Note: voltage input must be higher than output voltage >2V. (eg. input 7V , output 5V)
Clockwise Adjust Output Voltage will increase.