Nikolai Posted March 6, 2005 Report Share Posted March 6, 2005 Guess this question has been broth up before: I have read the switching psu pdf, etc. just wondering what’s wrong with connecting a regulated psu to J1 with the 7805 not connected, why use J2?, would not the rectifier and caps, just remove any extra ripple? Is this wrong?Nikolai Quote Link to comment Share on other sites More sharing options...
raphael Posted March 7, 2005 Report Share Posted March 7, 2005 why use J2?, would not the rectifier and caps, just remove any extra ripple? Is this wrong?The caps are no issue... but the rectifier will lower your voltage by 2 times the forward voltage of the diodes.So depending on the rectifier, you will get something between 3.6V and 4,4V instead of 5V.Raphael Quote Link to comment Share on other sites More sharing options...
Nikolai Posted March 7, 2005 Author Report Share Posted March 7, 2005 Ahhh!Thank you for clearing this!, I learn so much from this forum :DNikolai Quote Link to comment Share on other sites More sharing options...
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