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Video lesson with a detailed analysis of how a 220Vac/110Vac to 15Vdc switching power supply circuit works. EG - General Electronics Schematic Diagram: http://www.mediafire.com/view/lknjj95... http://www.mediafire.com/view/w6ca2wh... http://www.mediafire.com/view/cjy1p9b... note: C7 serves to protect the diode in parallel with it (D2) #eletronicajá If you want to support the growth of the channel, you can make a PIX: PIX Key: [email protected] http://blogeletronicaja.blogspot.com.... BLOG: www.blogeletronicaja.blogspot.com EMAIL: [email protected] FACEBOOK: / eletronicaja INSTAGRAM: / andrepenha01