You can remotely measure temperature using a 4- to 20-mA current loop as long as 4000 feet and a battery-powered, white-light LED driver. You usually configure this equipment to provide a programmable ...
Stumbling around the house in the dark can be dangerous—just think of all the toes you stub along the way. Today, though, you can grab some grown-up nightlights to help illuminate your nighttime path.
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