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  1. mysterymike

    Waterfall control

    Hey, if I have a water fall in my pond, on a small pump, can I get a valve which could control the rate of flow to the waterfall using a simple light dimmer type input? Does such a items exist or will I need to by a high end valve that is a 4-20ma or 0-10V control and then "create" the...
  2. mysterymike

    HID Lighting Ballast/Switching help

    What is the output of an HID lighting ballast? My understanding is it’s a high freq type AC with high starting voltage, and then a voltage that adjusts as the light heats up, I assume still AC of some high freq? Is this correct? The main (not only) reason I ask is this: we have ballasts and...

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