What am I missing here? I can’t get a low out of this thing to show good AC coming in.
HCPL3700V datasheet & application note.
I have 120V connected thru 30K resistors to pins 1 & 4, 10uF electrolytic cap across pins 2 & 3, Vcc at 5V with 0.1uF cap to Gnd, Gnd to Gnd, and Vo pin 6 to an Arduino input with internal pullup. Output stays at 5V.
I measure 59VAC at pins 1,2,3,4.
What do I need for a low? I am stumped.