How to display the 8 digit digital tube!!!

I don't know what the electronic basis of the questioner is.

In the simplest terms, an 8-digit digital tube can be seen as 8 small light bulbs (one of which is the decimal point after 8).

For example, if you want to display 1, the upper and lower light bulbs on the right side can be lit. In a certain order, number the 8 small bulbs, such as abcdefgh

When different values are displayed, such as from 0 to 9 (in fact, these 10 numbers change repeatedly), the number of the small light bulb when the ten numbers are displayed is written down, and the so-called "code" is formed.

In further applications, as long as the small bulb is lit according to a certain code according to the code written earlier, the corresponding number must be displayed.

Quanttile selection and segment selection, first display the first number, and then display the second number, and so on, because the switching time is short, due to the visual stay, you will see 8 digits.

Here's a scan loop I did, with p2 being a bit selection and p0 being a segment selection.

for(i=0;i<8;i++)

m=_crol_(m,1);

p0=0x00;Blanking.

p2=m;p0=led[i];

delay10ms();

The internal circuit of the 8-bit digital tube is simply composed of 8 light-emitting diodes, and the digital tube is divided into common negative type and common positive, for example, the segment signal of the digital tube is valid at high level, and the eight-segment digital tube is labeled abcdefgh in clockwise order, and when their value is 00001100, the digital tube is displayed as 1

According to the digital tube you use, check the digital tube code on the Internet, and when you use it, the program can be called.

A digital tube is a semiconductor light-emitting device, and its basic unit is a light-emitting diode.

The digital tube is divided into seven segments of the digital tube and eight segments of the digital tube according to the number of segments, and the eight-segment digital tube has one more light-emitting diode unit (more decimal point display) than the seven-segment digital tube; According to how many "8s" can be displayed, it can be divided into 1 digit, 2 digits, 4 digits and so on; According to the connection mode of the light-emitting diode unit, it is divided into common anode hail signal digital tube and common cathode digital tube.

A common anode digital tube is a digital tube in which the anodes of all light-emitting diodes are connected together to form a common anode (COM). When the common yang digital tube is applied, the common pole COM should be connected to +5V, and when the cathode of a certain field light-emitting diode is low, the corresponding field will be lit. When the cathode of a field is high.

, the corresponding field will not light up.

A common cathode digital tube is a digital tube in which the cathodes of all light-emitting diodes are connected together to form a common cathode (COM). When the common cathode digital tube is applied, the common pole COM should be connected to the ground GND, and when the anode of a certain field light-emitting diode is high, the corresponding field will be lit. When the anode of a field is low, the field does not light up.

The specific method is shown in the following figure:

A 4-position digital tube with the internal segments connected and the pins as shown in the diagram (the front of the digital tube is facing itself and the decimal point is below). a, b, c, d, e, f, g, and dp are the segments, which represent the bits of the four digital tubes.

The front of the digital tube is facing itself, and the decimal point is below; Then the pins of the old side of the slag are 1-2-3-4-5-6 from left to rightThe lower pins are 7--8-9-10-11-12 from right to left.

The digital tube is actually a glyph module with 8 LEDs connected to a "8" and a decimal point. To simplify these eight LED lines. One of the 8 LEDs is connected together, and one end of the positive electrode is connected together, which is called a common anode digital tube.

The negative terminal is connected together and is called a common cathode digital tube. In this way, the digital tube has 9 pin-outs. In order to facilitate wiring, the common end is led out by one more wire, therefore, the digital tube is usually 10 lead wires, of which the middle two are connected common ends.

In this way, the connection between this common terminal and the other 8 leads is the same as the lighting method of ordinary LEDs.