nfrXI4
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nf4mrmi80n.pages.dev/196
nf4mrmi80n.pages.dev/195
nf4mrmi80n.pages.dev/8
nf4mrmi80n.pages.dev/105
nf4mrmi80n.pages.dev/11
nf4mrmi80n.pages.dev/57
nf4mrmi80n.pages.dev/307
nf4mrmi80n.pages.dev/77
why do leds need resistors