Hi all. I'm a total novice and just enjoying working through the fantastic resource material on the site. Meanwhile I'm trying to figure out how to build an LED circuit powered from a 110V 60Hz AC line. I found the attached schematic online but I'm stumped by the resister? Why is R1 in parallel with D1. Also the capacitor limits voltage but does it also serve to limit current? If someone could kindly give an explanation of what's happening in this circuit I would be very grateful. Thank you.
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