Module Highlights 1. On-board voltage, current, power meter, you can easily use this module without a multimeter, which is simpler and more intuitive. 2. The onboard USB interface can easily charge your digital products. (Note: The USB output voltage is the same as the module output voltage, not a fixed 5V output, please confirm before charging the USB device) 3. High power, rate, low ripple;Three major functions: (1) Used as an ordinary step-down module with overcurrent protection capability; (2) Used as a charger for various voltage values of lithium batteries, batteries, nickel-cadmium-nickel-hydrogen batteries (battery packs), for solar panels, wind turbines and other occasions; (3) Used as a high-power LED constant current drive module; It has two modes of constant voltage and constant current, and there is an indicator light to indicate which mode the module is currently in;When used as a lithium battery charger, you can set the floating charging voltage and charging current, and there are indicator lights to indicate. Indicates whether it is charging or has been fully charged; With current limiting protection function, the module will not be burned out even if the output is short-circuited. The on-board voltage and ammeter can be self-calibrated, and there will be no problems With heat sink, copper pillar is given Module parameters. Input voltage: 5-36V. Output voltage: 1.25-32V continuously adjustable. Output current: adjustable, (recommended to use within 4.) Output power: 75W (recommended to use within 50W, please reduce the power when using large pressure difference) Working temperature: -40~+85 degrees. Working frequency: 180KHz. Conversion efficiency: 96%. Short circuit protection: yesOver-temperature protection: yes (automatically turn off the output after over-temperature)Input reverse connection protection: no, (if necessary,please connect a high current diode in series with the input) Installation method: 4pcs 3mm screw. Wiring method: wiring terminal or welding terminal, V-IN is input, V-OUT is output. Module size: length 68.2mm width 38.8mm height 15mmcolor: blueMaterial: PCB, MetalUse as a common step-down module with overcurrent protection:Instructions:(1) Press the right button, adjust the digital meter to the [display output voltage] interface, and adjust the "constant voltage potentiometer" to make the output voltage reach the voltage value you want;(2) Adjust the digital meter to the [display output current] interface, and directly short-circuit the output end of the module (find a thick wire to short the output end), and then adjust the "constant current potentiometer" to make the The current value reaches the preset overcurrent protection value; (for example, the current value displayed by the on-board ammeter is 4A, then the module current is limited to 4A, and the red indicator light is on when the current reaches 4A)(3) Connect the load and work.2. Use as a battery chargerThe module without constant current function cannot be used to charge the battery. Due to the large voltage difference between the exhausted battery and the charger, the charging current is too large and the battery is damaged. Therefore, the battery should be charged with constant current at the beginning. When the charging reaches a certain level, it automatically switches back to constant voltage charging.Package Contents:1 x Buck Power ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.