LED advertisement board, 123
no vote
123456789101121314151617181920 equivalent circuit looks simple, in Figure 1 foot heightening level, then abcdefgh and low level, the first line of the light emitting diode will be bright, but the actual device pins and not a row pin according to the order of 12345678 arrangement and another row of pins in the abcdefgh order arrangement. The actual pin is usually chaotic, I heard that the pin distribution technology is not open, I do not know is true or false, but we can test the distribution of pin. By 2012-10-25 late determination, above a row of HG2A4FDI below a row of 57BC8E63 (in the device front by the left to the right of the order)