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Hello, I have a motion detector that is normally closed and opens when you trip it, how do I reverse this?

the motion detector is a plain security one (without a light)

Picture of Hello, I have a motion detector that is normally closed and opens when you trip it, how do I reverse this?
110100101108 years ago
if there is unused 5th entry in the relay its probably NO. try connecting your circuit to NO and C
kelseymh8 years ago
Your blurry picture (yes, I know you're working on it :-) implies that the output is only NC. Is that really true? Often such circuits have both an NC and an NO output (i.e., the two opposite poles of a relay), for flexibility.

NO (as I'm sure you know) has the downside that it is an energy waster :-( If you can modify the system you want to control, you might want to consider redesigning it so that NC is the right approach (it draws zero current until tripped, then becomes activated).

If you're hooking into an existing system, then you can convert NC to NO with a relay in series.
Modarius (author) 8 years ago
I want to trigger a relay to control larger currents and let me work on that picture
Default1178 years ago
That's a little hard to say without a detailed picture and/or schematics. What do you wish to accomplish?