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Old 05-01-2010, 02:20 PM   #16
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damn wouldnt it just be easier to control the high voltage to activate the transformer??
4 words, (clap on,clap off) that is all...
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Old 05-01-2010, 03:25 PM   #17
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Originally Posted by kennzz05 View Post
damn wouldnt it just be easier to control the high voltage to activate the transformer??
4 words, (clap on,clap off) that is all...
Ken: The only problem is I want to have 2 channels, one for the lights and one for the pump.
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Old 05-01-2010, 03:26 PM   #18
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Originally Posted by Yoyizit View Post
The DC value of full wave rectified AC is about equal to the AC RMS value [12 vac], but the relay will probably buzz on unfiltered DC.
If you filter it with a capacitor the DC value will rise, so then you need a dropping resistor whose value depends on the coil current.

Paper calc's will get you close but you will still need to cut and try.
Yoyizit: I have no idea what you are talking about.
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Old 05-01-2010, 03:54 PM   #19
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Originally Posted by johnr9q View Post
Yoyizit: I have no idea what you are talking about.
That's why stuff burned out. You are in over your head.

The 200 w 'former puts out 12vac which is probably compatible with your pump and lights, because they work with it. Evidently the pump and lights draw less than 200w/12v = 17A.

The remote you pick can be powered either on 120vac or 12vac, or on DC if you get a wall 'former that takes in 120vac and puts out a compatible DC voltage. I don't recommend the wall 'former route.

Then, the remote can control the 120vac side of the 200 w 'former or the 12vac side, depending on what remote you get. Some remotes can only control DC.

Price out a few candidates - they'll probably be some clear winners.

Remotes that run on DC should be cheaper because they don't need an internal supply to convert 120vac into usable voltages. The hidden cost of ownership pops up when the buyer realizes the problems with supplying DC to the thing.

Last edited by Yoyizit; 05-01-2010 at 04:21 PM.
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Old 05-01-2010, 04:45 PM   #20
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Ken: The only problem is I want to have 2 channels, one for the lights and one for the pump.

purchase a second transformer so lights and pump are seperate
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Old 11-21-2010, 01:12 PM   #21
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Landscape transformer safety feature


Before you spend too much time on a wild-goose chase (as I did) - be aware that, as a safety measure, some landscape transformers will not output voltage unless there is an adequate load present on the output terminals. A voltmeter alone is not enough of a load to for the transformer safety circuit to begin outputting voltage. To test for voltage with your meter you must first install a minimum real load such as a single light bulb.
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