NODEMCU LUA  Mini Voltage Module Adjustable Voltage Reducer Board Voltage Converter Module Sensor Module Voltage Booster Module Power Supply Transformer Module

Voltage regulator input voltage range is DC 4.5-24V, adjustment range is 0.8-17V, fixed output is 1.8V, 2.5V, 3.3V, 5V, 9V, 12V selectable on the back. Maximum output current: 3A (cooling should be improved at full load); If the operating input voltage is 12V and the output is 1.5A, no additional system is needed
Adjustable and fixed voltage output, a fixed output voltage can be obtained by soldering the pot on the regulator module board; the fixed output voltage can also be adjusted by potentiometer as needed. The default output is adjustable. Note: If the output voltage needs to be fixed, use a knife to cut the wires in the red circle in the picture, and then connect the pads by soldering at the desired voltage