If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
A strain gauge (or strain gage) is a device used to measure strain on an object. Invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern.he gauge is far more sensitive to strain in the vertical direction than in the horizontal direction.
The Pocket Digital Scale. A digital scale is a weight measuring device that measures the weight of an object or a substance. Digital scales are internal strain gauge scales that need an electric power supply to operate. A strain gauge is a thin strip of electrically-charged, deformation-sensitive foil.he Pocket Digital Scale. A digital scale is a weight measuring device that measures the weight of an object or a substance. Digital scales are internal strain gauge scales that need an electric power supply to operate. A strain gauge is a thin strip of electrically-charged, deformation-sensitive foil.