The ordinary level is to determine whether the plane of the measured object has reached the level by observing whether the air bubble at the center of the level is at its center. In a dark environment, it is difficult to accurately judge the object with the naked eye. The electronic level uses the change of sound and light to indicate whether the plane of the object is level, so that it can be measured in any brightness environment, which is very convenient to use. As shown in the figure is the electronic level circuit.
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