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A comment on A dirt cheap “spectrum analyzer” with an RTL-SDR dongle. Parent comment

Re:A dirt cheap “spectrum analyzer” with an RTL-SDR dongle by nitrogen on Friday April 18, 2014 @01:10PM (#7610073)
The voltage drop of a resistor is proportional to current.
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Re:A dirt cheap “spectrum analyzer” with an RTL-SDR dongle by iiiears on Wednesday April 23, 2014 @03:08AM (#7632589)
So in many appliances the LED serves two functions, Light and part of the active circuit to lower voltage? - This is why HN has for me replaced slashdot and digg. Thank You.
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