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 […]