Introduction
Nixie tubes, also known as glow tubes, are electronic devices that can display numbers and other information. The glass tube includes an anode made of a wire mesh and a plurality of cathodes. The cathode shape of most nixie tubes is digital. The tube is filled with low-pressure gas, usually mostly neon plus some mercury and / or argon. Charging a certain cathode, the digital tube will emit color light, depending on the gas in the tube, usually orange or green.
Nixie tubes, also known as glow tubes, are electronic devices that can display numbers and other information. The glass tube includes an anode made of a wire mesh and a plurality of cathodes. The cathode shape of most nixie tubes is digital. The tube is filled with low-pressure gas, usually mostly neon plus some mercury and / or argon. Charging a certain cathode, the digital tube will emit color light, depending on the gas in the tube, usually orange or green.
Although similar in appearance to a vacuum tube, the principle is not to heat the cathode to emit electrons. Therefore it is called a variant of cold cathode tube or neon lamp. At room temperature, even under extreme indoor working conditions, the temperature of such pipes rarely exceeds 40 ° C.
The most common form of nixie tube has 10 cathodes, the shape is from 0 to 9, and some nixie tubes have one or two decimal points. However, there are other types of nixie tubes that display letters, marks and symbols. As a kind of "digital tube", its cathode is a mask made of a template, with a number-shaped hole on it. Some Russian digital tubes, such as IN-14, use the inverted number 2 for 5, presumably to save production costs, without obvious technical or aesthetic reasons. Most of the digital tubes in Russia use the inverted 2 as 5.
A 170 volt DC voltage is applied between the cathode and the anode, and each cathode can emit neon red-orange light. Due to the different gas mixtures, the colors of different types of digital tubes are different. The digital tubes with longer lifespan incorporate mercury in their manufacture to reduce sputtering, resulting in a blue or purple hue. In some cases, these colors are filtered by red or orange filter coatings on the glass.
classification
According to the connection mode of the LED unit, it can be divided into a common anode digital tube and a common cathode digital tube. The common positive digital tube refers to the digital tube that connects the anodes of all light-emitting diodes together to form a common anode (COM). When the common positive digital tube is applied, the common electrode COM should be connected to + 5V. When the cathode of a certain field of light-emitting diodes When the level is low, the corresponding field is lit. When the cathode of a 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). When the common negative digital tube is applied, the common electrode COM should be connected to the ground GND. When the anode of is high level, the corresponding field is lit, when the anode of a field is low level, the corresponding field is not lit.
arduino driver digital tube
/*
NixieTube
控制共阴极数码管显示数字0到9
*/
//设置控制各段的数字IO脚，具体几号引脚对应哪一段，来源为数码管官方引脚图。
int pin_a = 7;
int pin_b = 6;
int pin_c = 5;
int pin_d = 10;
int pin_e = 11;
int pin_f = 8;
int pin_g = 9;
int pin_p = 4;
//根据共阴极数码管段码表定义0~9显示的各段开关状态
int numTable[10][8] = {
//1为点亮，0为关闭
//a b c d e f g dp
{1, 1, 1, 1, 1, 1, 0, 0}, //0
{0, 1, 1, 0, 0, 0, 0, 0}, //1
{1, 1, 0, 1, 1, 0, 1, 0}, //2
{1, 1, 1, 1, 0, 0, 1, 0}, //3
{0, 1, 1, 0, 0, 1, 1, 0}, //4
{1, 0, 1, 1, 0, 1, 1, 0}, //5
{1, 0, 1, 1, 1, 1, 1, 0}, //6
{1, 1, 1, 0, 0, 0, 0, 0}, //7
{1, 1, 1, 1, 1, 1, 1, 0}, //8
{1, 1, 1, 1, 0, 1, 1, 0}, //9
};
void setup()
{
for (int i = 4; i <= 11; i++)
{
pinMode(i, OUTPUT); //设置4～11引脚为输出模式
}
}
void loop()
{
for (int i = 0; i < 10; i++)//以此显示数字0到9
{
digitalWrite(pin_a, numTable[i][0]); //设置a 引脚的电平
digitalWrite(pin_b, numTable[i][1]); //设置b 引脚的电平
digitalWrite(pin_c, numTable[i][2]); //设置c 引脚的电平
digitalWrite(pin_d, numTable[i][3]); //设置d 引脚的电平
digitalWrite(pin_e, numTable[i][4]); //设置e 引脚的电平
digitalWrite(pin_f, numTable[i][5]); //设置f 引脚的电平
digitalWrite(pin_g, numTable[i][6]); //设置g 引脚的电平
digitalWrite(pin_p, numTable[i][7]); //设置dp引脚的电平
delay(200);
}
}
Physical phenomenon
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