LED dot matrix screen common anode and common cathode how to distinguish?
Judging by the multimeter, multimeter in a diode detection gear pin probe connected to the digital tube,This section of the digital tube can be lit in the forward direction.
Find the common pole, first assume the common negative, connect the public pole to the negative pole of the DC power supply, and then connect the positive pole to one of the pins,For example, A, the voltage increases slowly from low to high. If the light, it proved to be a total of yin or yang.
Nixietube refers to the anode all light emitting diodes received together to form a common anode digital tube (COM).Yang digital tube in the application should be very public COM to +5V, when the cathode a field emitting diode is low, the corresponding field lights. When the cathode of a field is high, the corresponding field is not bright.A common cathode digital tube is a digital tube that connects all the LEDs together to form a common cathode (COM).When the utility model is used, the common pole COM is connected to the ground wire GND, and when the anode of a certain field is high, the corresponding field is lightened. When the anode of a field is low, the corresponding field is not bright.
