The module is fully explained. Setting voltage and current is shown. All components and datasheets were visited. The accuracy of the reading voltage was tested. The module was tested with 30 V, 24 V, 15 V, 12 V, 5 V, 3.3 V, and 1.5 V at different currents. Lithium-ion battery charging is shown, and the ripple voltage of the output was measured on an oscilloscope.