My garage door opener has output terminals that output 10V as idle and 24V when the opener is running. I have the output connected to a 24V relay to control the lighting in the garage. My problem is that the 10V idle voltage is enough to keep the relay closed.
My thought was to insert a 20V 5W zenerdiode to get rid of the 10V idle voltage, however, my concern is voltage loss across the zenerdiode is too great for the relay to be able to close when the output terminals produce 24V.
Am I right in my concerns or will this solution work?
I'd like to solve this problem using a passive circuit, but any solutions are welcome.