what you need1 module buck converter 12A 150W1 DC 0-200v 10A Voltmeter Ammeter1 Potentiometer VR 5k ohm2 jack powerThe cost to make this power supply: ~ 50-100$Production costs in vietnam only : ~30$and this my videoBy: thachn2Continue Reading »from Instructables: exploring - featured http://ift.tt/2q5WsgKvia IFTTT