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Old 28th Jan 2016, 8:03 pm   #1
merlinmaxwell's Avatar
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.
Cats have staff, it's dogs that have owners.
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