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Old 28th Jan 2016, 8:03 pm   #1
merlinmaxwell
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Join Date: Jul 2008
Location: Maidenhead, Berkshire, UK.
Posts: 9,414
Default Save yourself a quid or so...

Building a power supply for my radios/antenna/usb link that needs 13.7/12 and 5V. Got all the bits, built, checked and powered up, BANG, the 5V regulator lost its smoke.

I thought I was being clever by getting a 3A 7805 style regulator for the 5V (you can't have too much current available), wrong, the pinouts are not the standard in/common/out but in/out/common oops!! And of course the tab was grounded (so much for the current limiting).

Moral of this story, read the datasheet first.
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