Traditional Chinese Electronic level: Circuit Design, Parts List & Workshop Prototype Guide
In short: Traditional Chinese Electronic level. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 5286 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
electronic levelThe woodworking level determines the level of the plane being measured by observing whether the air bubble in the glass tube in the middle of the ruler is at the center of the ruler. However, when the light is dark or at night, it is used to verify whether something or an instrument is placed level, and it is more difficult to see the position of the bubble.With the development of the electronics industry, it is easy to solve this problem. Electronic level is a good solution. It uses two light-emitting diodes as a level indicator, which can be easily used and seen under any light conditions or at night, and has practical and promotional significance.The circuit of the electronic level is shown in Figure 33-1.Figure 33-1In the figure, K1 and K2 are one-way mercury switches, which are composed of a long pole and a short pole. The mercury tank spans the long electrode. When the electronic level is in the horizontal position, the mercury beads in the mercury tank connect the two short electrodes at the same time, and the two light-emitting diodes LED1 and LED2 light up together. When the ruler tilts to the left, the mercury bead on the left rolls along the mercury groove toward the left end of the ruler, disconnects the short electrode on the left, and the light-emitting diode LED1 does not light up. Since the right end of the ruler is high, the mercury beads on the right tightly connect the long and short electrodes on the right side, and LED2 is always on. Similarly, when the ruler tilts to the right, the light-emitting diode LED2 on the right does not light up and the LED1 on the left lights up. It can be seen that the electronic level is not only intuitive and clear at a glance, but also extremely convenient to use. …
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Lei Cheng
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Lei Cheng