I would like to ask 24 feet of two-color LED dot matrix working principle and circuit diagram
It is the working principle of dynamic display, each time only one LED was lit, because its operating frequency is very high, so the eyes do not see it as a dynamic, LED dot matrix input with rows and columns between the rows and columns of the corresponding access signal LED will be lit but at the same time, only one row and column is connected to the signal, otherwise they will be garbled.
Column scan line. 8 feet of the 8 lines line access on a chip, such as 2003, the other 8 listed above the line to 8 feet into a chip, such as 595, so that line the first line when line is high, and the first column of the line is low, then there is the first line of the first column of the lamp light. Then the next line continues to be high, the line is changed into second columns is low, is the first line of the second column of the lights. Similarly, when line second line on the behavior of high level, the first column is low, so that the light is the first rows of second light. This is equivalent to using coordinates to lock the meaning of a light, which is bright when you want to make the software.
It's about putting 64 LED in 8 rows and 8 columns. One LED has two feet. This one should know. Then, put one foot of each line together. (either the anode, or the negative pole, should be unified), and then draw a line out of the line as a drive line, there are 8 such lines. Then, each of the columns is not connected to the foot, followed by columns, but also lead a line out.
