The LM2575 switching regulator circuit schematic drawing.
Wiring schematic diagram for the course and fine voltage adjustment potentiometers.

The top drawing is the main schematic and below it is the wiring diagram for the course (25k) and fine (5k) voltage adjustment potentiometers.


LM2575- ADJ Switching Regulator Parts List

C1 -   100uf  Electrolytic Capacitor
C2 - 1000uf  Electrolytic Capacitor
C3 -     .1uf   Ceramic Capacitor
C4 -     .1uf   Ceramic Capacitor

D1 - 11DQ06 Scottky Diode 60 volt 1.1A
D2 - 1N4002  Diode General Purpose 1A

F1 - Fuse 1A

IC - Regulator - 2575 - ADJ

J1 - Jumper

L1 - TE2017 330uH, 0.9A, 50KHZ

P1 - 25k  Potentiometer
P2 -   5k  Potentiometer

R1 - 1K Resistor

  Note:
The capacitors should be rated at 50 volts or higher. On my board I left C3 empty and used a 2uf tantalum capacitor for C4 since I had some on hand.

The J1 Jumper shown below can be removed to access the regulator's on/off pin #5.

Switching regulator circuit board drawing showing circuit and components.
Pictorial Drawing of Switching Regulator Potentiometer Wiring.
Switching regulator circuit board layout pattern.

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