If the impedance change of the PCB design only occurs once, for example, the line width changes from 8mil to 6mil and then remains at 6mil, the impedance change must be less than 10% to achieve the no
8X8LED dot matrix The internal structure and appearance of the dot matrix are as follows. The 8X8 dot matrix consists of 64 light-emitting diodes, and each light-emitting diode is placed at the inters