The electric counter circuit

Published:2011/6/6 22:50:00 Author:qqtang | Keyword: electric counter | From:SeekIC

The counter can switch mechanical counting in to the electric counting, and it is LED digital display, which is simple, and it can be used in many industries and meet the needs of modern industries and life. The principle working circuit is shown in the figure, which includes power supply, photoelectric counting and counting display, three parts. The photoelectric counting sector: when the light dependent triode VT1 receives the infrared rays from the infrared diode VD1, the its current is rising , internal resistance is reducing and the pole is outputting a low LEV.



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