[hpsdr] LED polarity

[Lyle Johnson]

> We have standardized on marking LED anodes with a "+" sign. It is easy 
> to read and does not imply any correspondence with the marked end...
> 
> This method has really cut down on the incidence of "dead LED" syndrome 
> on our prototypes. When we just used a dot or thick bar, we had about a 
> 50% chance of getting the parts put on properly. :-)

Excellent feedback, Scott.  I'll put a + on the LEDs.

73,

Lyle KK7P


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