LED Digital Tube Performance Simple Detection Method Introduction

The LED digital tube machine can simply detect the indecent of the LED digital tube. The indecent requirements of the LED digital tube require the color average, no local discoloration and air bubbles. Under the premise of amateur, it can be used as further inspection. The negative electrode of the 3 volt dried batteries is fixed on the public negative extremes of the LED digital tube. When this line touches the positive extremes of a certain stroke, that stroke should be displayed. In this simple way, you can check whether the digital tube has a broken pen (a certain stroke cannot be displayed), even the pen (some strokes are connected to the road), and it can be compared with the strong and weakness of the more diverse strokes. If you can check the co -anode digital tube, you only need to change the battery positive and negative poles to change the line. The method is the same as above. LED digital tube Each strokes work current ILED is about 5—Between 10mA, if the current will destroy the digital tube during the New Year's Eve, it is necessary to increase the flow resistance. The resistance value can be calculated according to the formula: R value = (u—ULED)/ILED The car is installed with LED lamp bead U to add the two -head voltage of the LED, and ULED is the LED digital tube for each voltage (about 2 volts). HFE sockets that manipulate digital universal meters can easily check the luminous environment of LED digital tubes. When selecting the NPN gear, the C hole is positive, and the moonhole is negative. For example, when checking the LTS547R -type co -cathode LED digital tube, insert a single -stock detailed guide wire from the Eh hole, and the wire leads to the end 9 pole (the foot and the second foot are connected internally, can choose one as?); C -hole leads a wire to contact the electrodes of each segment in order, which can be separated from the corresponding strokes.