Please do not use the input ground and output ground of the module together when using this product. This will cause the current sampling resistor on the back of the board to be bypassed, making the module unable to adjust the output current. Burn the power chip on the module. This module is easy to use and powerful! !! !! A module has 3 major functions to meet your most occasions! !! !! Module highlights: 1.High power, high efficiency, 5A, low ripple;2. Three in one: (1) Used as a common step-down module with overcurrent protection capability; (2) Used as a charger for lithium batteries, batteries, nickel-cadmium-nickel-metal hydride batteries (battery packs) of various voltage values, used in solar panels, wind generators, etc. (3) Used as a high-power LED constant current drive module;3. There are two modes of constant voltage and constant current, and there are indicators to indicate which mode the module is currently in;4. When used as a lithium battery charger, the floating charging voltage and charging current can be set.Indicates whether it is charging or is fully charged;5. With current limiting protection function, even if the output is short-circuited, the module will not be damaged. The input ground and output ground of the module should not be shared together. This will cause the module's current sampling resistor to bypass, which will make the module unable to adjust the output current. It is easy to burn the module when the load is connected. Application range 1. Used as a common step-down module with overcurrent protection capabilityInstructions:(1) Adjust the constant voltage positioner so that the output voltage reaches the voltage value you want(2) Use the multimeter 10A current scale to measure the output short-circuit current (just connect the two test leads directly to the output terminal), and adjust the constant current potentiometer to make the output current reach the predetermined overcurrent protection value. (For example, the current value displayed by the multimeter is 4A, then the maximum current when you use the module can only reach 4A, and the red constant voltage and constant current indicator is on when the current reaches 4A, otherwise the indicator is off)Note: When used in this state, because the output terminal has a 0.05 ohm current sampling resistor, there will be a voltage drop of 0 ~ 0.3V after connecting the load. This is normal! This voltage drop is not pulled down by your load, but rath