How does the nixie tube light up to display the answers
The digital tube is arranged by multilayer LEDs, and the display principle of LED is no different from that of traditional lighting. The general digital tube includes 7-level LED, and 8-level LED is just one of them. Other LED levels are basically the same, as shown in the figure below.
The digital tube is arranged by multilayer LEDs, and the display principle of LED is no different from that of traditional lighting. The general digital tube includes 7-level LED, and 8-level LED is just one of them. Other LED levels are basically the same, as shown in the figure below.
As for the control of LED, the software will have different level values when lighting LED according to the hardware design of LED. As shown in the figure below, LED circuit: LED anode pulls up VDD voltage, LED, chip output port outputs low level; Similarly, when the LED cathode is pulled down to ground, the LED will be lit and output high level;
Therefore, the digital tube is divided into a common cathode and a common anode. The common anode is connected to the anode of all LEDs and connected to the power supply. In this way, the low level at the other end of such LED will be lit. The common cathode connects the cathodes of all light-emitting diodes and the power supply. Like this, like this, the high level will be lit.
Therefore, the software that controls LED lighting is different; "The role of COM port" In addition, we will also see the COM control port on the nixie tube. In fact, it is very similar to the film selection function. Its name is bit line selection, and a, b... dp of seg above is line segment line selection; How is this film selection made? For example, the common cathode COM port is connected to the common terminal of the common cathode, so when the COM output is high, all LEDs cannot be lit, because the cathode is high, all LEDs are off, in other words, they cannot be controlled; When the COM output is low, the LED can extinguish the LED according to the voltage of section line selection to achieve data display; According to the above principle, only one COM is selected at a time and the seg port inputs the corresponding data, thus realizing the chip selection function;
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