3030CR-R SMT digital Shu Shu three digital Shu 0.3 inches

3030CR-R SMT digital Shu Shu three digital Shu 0.3 inches 1. Product name: 3030CR-G 2, word bits: 3 3, light colors: red; (other colors can be customized) 4, polarity : common cathode / common anode 5, the surface color: gray panel, black panel 6, font color: red / green / blue / white / orange 7, colloid color: white A, static display driver: static drive, also known as DC drive. Static drive means for each digital code for each segment by a microcontroller I / O port to drive, or use as BCD code two - Decimal * is * driving. Static drive advantage is simple programming, high brightness display, the disadvantage is occupied by I / O port and more, such as drive five digital static display requires 5 × 8 = 40 根 I / O port to drive, you know a 89S51 microcontroller available The I / O Eloquence 32 yet. We must increase the actual application * drive for drive, increasing the complexity of the hardware circuit. B, dynamic display driver: digital dynamic display interface is one of the most widely used microcontroller, a display mode, increase public very COM bit strobe control circuit for each digital control, bit strobe I by separate / O line control, microcontroller for bit strobe COM side of the circuit control, the digital control of strobe control we just need to show the open, the bit on the show shape, no strobe light digital tube will not . Through sharing in turn control the COM terminal of each LED digital tube, it makes each turn controlled digital display, which is a dynamic drive. Digital lighting time per bit is 1 ~ 2ms, because the human persistence of vision effect phenomenon and afterglow light-emitting diode, and despite the fact that you are not at the same time digital tube lights, but as long as the scan fast enough to people the impression that a stable set of display data, there will be no light flashes, dynamic and static display effect is the same, can save a lot of I / O ports, and lower power consumption.