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- Can the 4N35 optocoupler handle 6 VAC in its input, or do I need to rectify it to DC?
I am designing a zero crossing detector for Arduino using the 4N35 optocoupler. This is just a small part of a large project. I haven't bought the components yet, so do not ask me for readings. Everything is in the planning phase now.
My input will be a 6-0-6 transformer (220V to 6V step down).
I was having a look at this website where they have controlled an AC fan using an Arduino and a TRIAC. They have fed the 9 VAC output from their transformer directly to their 4N25 optocoupler:
In https://forum.allaboutcircuits.com/threads/zero-crossing-with-4n25-issue.138690/, they have first rectified the AC to DC, and then fed it to the optocoupler (don't look at the input; I will be using 6 VAC):
The above circuits use 4N25, but I believe using a 4N35 won't create any problem. Do I need to rectify the input to the 4N35, or can I directly feed it 6 VAC?
My input will be a 6-0-6 transformer (220V to 6V step down).
I was having a look at this website where they have controlled an AC fan using an Arduino and a TRIAC. They have fed the 9 VAC output from their transformer directly to their 4N25 optocoupler:
In https://forum.allaboutcircuits.com/threads/zero-crossing-with-4n25-issue.138690/, they have first rectified the AC to DC, and then fed it to the optocoupler (don't look at the input; I will be using 6 VAC):
The above circuits use 4N25, but I believe using a 4N35 won't create any problem. Do I need to rectify the input to the 4N35, or can I directly feed it 6 VAC?