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• I developed for my PIC projects but can be used in general-purpose.  9v>5v and 5v>3.3v  switch mode regulator
• 3.3v is available in SD card and MMC card project
• No noise with Switch Mode system
• I would particularly recommend , the use of high-speed crystals
• I would recommend the use of tantalum capacitors
• IMPORTANT! – Tantalum capacitors can explode if connected incorrectly

Required Materials

1. 1 PCS – 75mmx60mm pertinaks
2. 1 PCS – LM2576  IC
3. 1 PCS – 79L05 IC
4. 1 PCS – LM2576-3.3v  IC
5. 1 PCS – 1N5819 Diode
6. 1 PCS – 100UH Coil
7. 2 PCS – 100uf – tantalum Capacitors
8. 4 PCS – 1uf – tantalum Capacitors
9. 1 PCS – 330uf – electrolytic  capacitor
10. 2 PCS – 1000uf – electrolytic  capacitor

NOTE!  – 2pcs 9v battery connected to the circuit input or “ +9v gnd -9v Power Supply” You can use the circuit.

Circuit Schematic

Technical Documents

• LM2576 Datasheet
• LM79L05 Datasheet