1 The internal connection mode of the digital tube The seven segment electrodes of the digital tube are A to G (lowercase letters in some materials), as shown in Figure 1. These eight-segment luminous tubes are called a, b, c, d, e, f, g, and dp. Through different combinations of the eight luminous segments, it can display 0-9 (decimal) and 0-15 (hexadecimal) ) And so on 16 numbers and letters, so as to realize the display of integers and decimals. Figure 1 Electrodes of the digital tube The LED inside the digital tube has two connection modes: common cathode and common anode. The internal connection of the digital tube is shown in Figure 2. Figure 2 The internal connection mode of the digital tube Common anode digital tube refers to a digital tube that connects the anodes of all light-emitting diodes together to form a common anode (COM). The common anode digital tube should be connected to the common pole COM to +5V during application. When the cathode of a light-emitting diode in a certain field is low, the corresponding field is lit. For example, when segments a, b, g, c, d are connected to a low level, and other segments are input to a high level, the number "3" is displayed. When the cathode of a certain field is high, the corresponding field is not lit. Common cathode digital tube refers to the digital tube that connects the cathodes of all light-emitting diodes together to form a common cathode (COM). The common cathode nixie tube should be connected to the ground line GND when the common electrode COM is applied. When the anode of a certain field of light-emitting diodes is high, the corresponding field is lit. When the anode of a certain field is low, the corresponding field is not lit. For example, when segments a, b, g, c, d input high level, and other segments input low level, the number "3" is displayed. The internal structure of the commonly used digital tube is shown in Figure 3. Figure 3 The internal structure of commonly used digital tubes The pin arrangement of commonly used four-digit digital tubes is shown in Figure 4. Figure 4 The pin arrangement of commonly used four-digit digital tubes The pin arrangement of commonly used two-digit digital tubes is shown in Figure 5. Figure 5 Pin arrangement of commonly used two-digit digital tubes The numbers on the nixie tube are composed of seven strokes, a, b, c, ..., f, DP is a decimal point segment, and the lead pins of each stroke segment are arranged in double rows. When the digital is upright and looking down, the lower left corner is the first foot, and the remaining feet are determined in a counterclockwise order. The nixie tube pin arrangement is shown as in Fig. 6. Figure 6 Digital tube pin arrangement 2 Driving mode of digital tube To display the nixie tube normally, it is necessary to use the drive circuit to drive each segment of the nixie tube to display the desired number. Therefore, according to the different driving methods of the nixie tube, it can be divided into static and dynamic types. 2.1 Static display driver Static display drive is also called DC drive. The static display drive means that each segment code of each nixie tube is driven by the I/0 port of a single-chip microcomputer, or driven by the decoding of a two-decimal decoder such as BCD code. The advantage of static display driver is simple programming and high display brightness. The disadvantage is that it takes up more I/0 ports. For example, when driving 5 digital tube static displays, 40 (5×8) I/0 ports are required. You must know that a 89551 single-chip microcomputer is available. There are only 32 I/0 ports, so a decoder driver must be added to drive in actual applications, thereby increasing the complexity of the hardware circuit. 2.2 Dynamic display driver The digital tube dynamic display interface is one of the most widely used display methods in the single-chip microcomputer. The dynamic display driver is to combine all the 8 display strokes of the digital tube "a, b, c, d, e, f, g, dp" The ends of the same name are connected together, and a bit strobe control circuit is added for the common pole COM of each nixie tube, and the bit strobe is controlled by each independent I/0 line. When the single-chip microcomputer outputs the font code, all the nixie tubes receive the same font code, but which nixie tube will display the font depends on the control of the single-chip microcomputer on the COM terminal circuit of the bit strobe, so we only need to change the number that needs to be displayed. When the strobe control of the tube is turned on, the bit will display the font, and the digital tube without strobe will not light up. Through time-sharing, the COM terminal of each digital tube is controlled in turn to make each digital tube display in turn. This is the dynamic display drive. In the alternate display process, the lighting time of each digital tube is 1~2ms. Due to the persistence of human vision and the afterglow effect of light-emitting diodes, although the digital tubes are not actually lit at the same time, as long as the scanning speed is sufficient Quick, it gives the impression that a set of stable display data will not flicker. The effect of dynamic display is the same as that of static display, but it can save a lot of I/0 ports, and the power consumption is lower.
Uwell vape is very popular in the UAE,TSVAPE wholesale Uwell vape, with so many options available for Atomizers, Electronic Cigarettes, Electronics, you need not go anywhere else. For many people, Uwell is a company synonymous with high-flavor, high-quality vape tanks. Each of these sub-ohm tanks is considered first-in-class. TSVAPE wholesale Uwell vape, with so many options available for Atomizers, Electronic Cigarettes, Electronics, you need not go anywhere else.
Uwell Vape,Vape Juice,Vape Mod,Vape Tank TSVAPE Wholesale/OEM/ODM , https://www.tsecigarette.com
