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jjohnson 01-03-2007 12:54 AM

Two motion sensors on one circuit?
Greetings all, what a great forum, I just discovered it.

I have a walkway row of three outdoor post-mounted lamps on one circuit. Each takes a single bulb of max 100 watts. It was recently installed by a contractor with a simple day/night sensor so that all lamps go on at dusk and off at dawn.

Here's my question: I'd like to avoid having the lamps on all night - it makes the walkway look a little too inviting at 3am. Can I install a motion sensor at each end of the row of lamps, so that whether a person is coming or going, either of the sensors can turn on the lamps for 5 minutes or so?

Thanks much for any thoughts or advice on this,


jwhite 01-03-2007 05:23 AM

It would be a really cool set up to have the two motion sensors. In order to get them to control all three lights, you will need a bit of relay logic to isolate the load side wires of the different sensors.

Unless someone knows of a brand that does not have this problem, my experience is that the motion floods do not like being backfeed.

And easier solution might be to look into X-10 compatable controls. You would need the two motion transmitters, and a reciever at each light. With an extra push button transmitter at the house you could have an override switch handy. With a couple more components you could get very fancy.

redline 01-04-2007 07:39 PM

I believe that they have post mount sensor lights. Install the motion sensor lights on each post and allow the post (light) to be activated as needed indepently.

jjohnson 01-06-2007 04:06 AM

thanks jwhite and redline. The x10 idea sounds very interesting. If its allowed on the forum can you recommend a good resource? I know nothing about x10 but I have a decent engineering aptitude...

jwhite 01-06-2007 06:22 AM

Here are two links to web sites with these products.

Since you are good at engineering, you should be able to sort out all the details about designing something that will work for you.

jwhite 01-06-2007 06:27 AM

I found a good explaination of almost exactly what you originally asked.

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