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Old 01-28-2010, 01:05 PM   #1
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Timer to control two electrical devices


I would like to install an outside timer that will individually control the light for a flag at night and run a fountain during the day. That is to say turn on the flag pole light at night and off at daybreak then turn the fountain on during the day. I understand I could install two timers but would like to use one timer to do both jobs. Is such an animal available? If so, what do I ask for? Bill

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Old 01-28-2010, 02:03 PM   #2
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Timer to control two electrical devices


Well I think what you want to search for is a multi-station timer. Station one would be your flagpole and station two would be your fountain. They are common in low voltage for irrigation and lighting systems and so forth. I have never seen one for exterior 110V-120V use though. Time to Google!

If you could move things to indoor outlets, you could pick up something like an X-10 system that gets programmed by your computer.

http://www.x10.com/automation/index.html


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Old 01-28-2010, 02:08 PM   #3
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Timer to control two electrical devices


Sounds like you'd need a single pole/double throw (3-way) timer switch. I'd think they exist.
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Old 01-28-2010, 02:09 PM   #4
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Timer to control two electrical devices


What about something like this?

http://skycraftsurplus.com/outdoorti...ble-throw.aspx
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Old 01-28-2010, 02:25 PM   #5
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Timer to control two electrical devices


The intermatic T105 looks like it can be wired SPDT as well...

http://www.intermatic.com/products/t...ur%20dial.aspx

Click T105 towards the bottom.

You might want to put a standard single pole switch before your timer so you have the ability to turn both devices off at the same time. Of course, this switch would need to be on for your timer (and any of the two devices) to work.
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Old 01-28-2010, 08:06 PM   #6
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Timer to control two electrical devices


I also vote for X-10 or something like it. I have used a single timer that can control up to four devices. Each device can be on it's own schedule, which can include up to four on and four off cycles for each day.

Like all X-10, the timer sends control signals through the powerlines, which are recieved by the modules that control your load. I have a few modules made by black and decker that are designe for outdoor use. I use one for a fountain. I use others for christmas lights.

If you assign the same X-10 address to multiple devices, they can all respond to a single schedule. If you assign different X-10 addresses to each device, the respond to thier own schedule.

Pretty cool, I think. But beware...they can be fail to work if you have noisy electrical power or lots of electronics around the house causing interference. You also have to make sure your devices are all on the same power phase, or else you are going to need additional devices to bridge the phases.

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