Heavy bulky quite strong and a shake :) a power supply circuit is adjustable from 12 … 15 volt regulator integrated 12volt classic L7812 was carried out by increasing the flow of Integrated control of the L7812 (12v positive... Electronics Projects, 7812 and 2N3055 12v-15 Volt 20 Amp Power Supply "power electronic projects, power supply circuit, power supply project, " Date 2016/05/03