15 Watt switching power supply schematic diagram. Pulse transformer T1 is performed on the ferrite core M2500NMS-2 or M2000NM9 Sh5h5 size (cross-section of the magnetic coils at the location of 5×5 mm with a gap in the center). Winding wire is made brand PEL-2. Winding 1.2 turns of wire contains 600 0.1 mm in diameter, 3-4 – 44 turns of 0.25 mm diameter, 5-6 – 10 turns in the same wire as the primary winding.
