@A. Wells posted:
Would a diode bridge rectifier at the input help with LED flicker for AC power sources?
A bridge diode would be better of course, but larger; as would a 47uF cap or similar, as suggested by grj. But to me an led flickering at 30 Hz is not noticable at all. Maybe it's just my tired old eyeballs? And the more jewellery you add the bigger the board becomes; I wanted something simple and compact. You often don't have a lot of room to work with.