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Power supply module input voltage range is DC 5.3-32V; output voltage range is DC 1.2-32V, can be arbitrary adjustable. The buck converter is designed with LCD, can display input and output voltage, output current and output power; voltage display resolution is 0.05V, current display resolution is 0.005A. The voltage regulator module is with reverse connection protection at input terminal, reverse connection will not burn; short circuit protection. The volt conversion board can be used as an ordinary buck module with over-current protection; used as a high-power LED constant current driver module; DIY a solar power controller, etc. Button control output voltage ON / OFF status, and you can set the default output state is ON or OFF of the next time power-on.