Evening all.
I hope I have attached a link to a simple circuit that I have borrowed. This circuit uses a 4n25 opto to sense a 24vac supply.
I would like to use this same circuit to sense mains volts, 240 vac.
Can someone please suggest what I should raise the resistor values to?
http://s195.photobucket.com/albums/z278/man_in_uk/?action=view¤t=4n25.jpg
I hope I have attached a link to a simple circuit that I have borrowed. This circuit uses a 4n25 opto to sense a 24vac supply.
I would like to use this same circuit to sense mains volts, 240 vac.
Can someone please suggest what I should raise the resistor values to?
http://s195.photobucket.com/albums/z278/man_in_uk/?action=view¤t=4n25.jpg