They say :) This should be simple SMPS IR2153 and basic materials, as well as passive components symmetric with a goat SMPS Circuit Control Circuit IR2153 is based on very few elements are used on the control circuit board... Electronics Projects, IR2153 ATX Transformer with Symmetrical Output SMPS Circuit "power electronic projects, smps circuits, smps projects, smps schematic, " Date 2016/05/02