RE: A question I "should already know the answer to", but I don't

Posted by Chris60601 on Nov 16, 2015; 12:16pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/A-question-I-should-already-know-the-answer-to-but-I-don-t-tp26007p26019.html

I get the diode (for polarity protection) but I dont understand the usage of the resistor.