I don't think the optoisolator will work though since it senses voltage, not current. It's a great idea for sensing the presence of voltage so I'll file that away for use later.
Yep, it's actually flashing at 60Hz, but a cap on the output of the isolator will take care of that problem nicely.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16