Don't worry.

The new car code line can be changed. There are two kinds of new car coding lines: mechanical new car coding line and electronic new car coding line. The most common form of new car instrument is 10 cathode, which is the shape of numbers 0 to 9, and some digital tubes have one or two decimal points. However, there are other types of digital tubes that display letters, marks and symbols.

There are half digits, such as 1, 2, 3, 4, 5, 6, 8, 10, etc. Led digital tube is divided into * * * cathode and * * * anode according to different LED connections. Understanding these characteristics of LED is very important for programming, because different types of digital tubes are different except hardware circuits.

Control of new car instrument;

Seven-segment digital tube is divided into * * * anode and * * * cathode. The anode (or anode) of a seven-segment digital tube with * * * anode is the anode of eight light-emitting diodes, and the other contacts are the cathodes (or cathodes) of independent light-emitting diodes. Users can control the seven-segment digital tube to display different numbers simply by connecting the anode and grounding different cathodes. The seven-segment digital tube of * * * cathode is only connected in the opposite way to the anode.