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In which option, the diode will make the lm78xx circuit safer

This image was taken from Fairchild's datasheet on lm78xx. I have already built a working example of it, but I am still thinking about adding some additional diode protection (D1, D2). Which option ...
pggu11's user avatar
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LM78xx Reverse Polarity and Reverse Bias

I'm building a circuit that will use a LM7805 and LM7812 to produce 5VDC and 12VDC respectively, with the input power being ~16VDC from an external wall wart. I already fried one of each regulator ...
RobotAndy's user avatar
  • 245