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How to use an H11AA1 optocoupler to make a missing half sine wave mains detector

newbee

Apr 2, 2013
5
Joined
Apr 2, 2013
Messages
5
Hi all,
I have no knowledge in electronics.
In my project I'm driving multiple stepper motors controlled by an Arduino.
I need to stop the steppers and write their position to EEPROM in case of power shortage.
I was told to try an H11AA1 but I'm lost !
The other idea is to use an UPS with a TTL signal. But I don't know how to choose one.
Any suggestions pls ?
 

danadak

Feb 19, 2021
766
Joined
Feb 19, 2021
Messages
766
Using an opto coupler as a zero cross detector, stated another way when
zero cross no longer occurs of line there is a power outage. Use that as
an interrupt to signal line loss.


A board used for eval, eg. a reference circuit to look at :


Circuit here : https://forum.allaboutcircuits.com/...ng-optocoupler-as-zero-cross-detector.145157/


Regards, Dana.
 

newbee

Apr 2, 2013
5
Joined
Apr 2, 2013
Messages
5
Thank you Dana. Let me see if I can understand your suggestions and get back to you.
 
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