nigelmercier
New Member
I have a refrigerator on my boat, and it takes a fair bit of current from the 12V supply. I would like to make a circuit such that it was only switched on when the battery was charging, say over 13.2V.
I think it would be best to use a LM311 comparator (datasheet **broken link removed**), but I'm not sure about the ancillary components.
One issue to consider is that when the relay fires, the load of the fridge will cause a dip in the supply rail. If there is not some form of damping, this will cause the circuit to switch off, then the voltage will rise, and the circuit will switch on ...
Any suggestions?
I think it would be best to use a LM311 comparator (datasheet **broken link removed**), but I'm not sure about the ancillary components.
One issue to consider is that when the relay fires, the load of the fridge will cause a dip in the supply rail. If there is not some form of damping, this will cause the circuit to switch off, then the voltage will rise, and the circuit will switch on ...
Any suggestions?