16位恒流LED彩屏驱动电路，有16个恒压源，通过双极器件给出一个2-80mA的恒定电流，高效驱动LED-Color 16-bit constant current LED driver circuit, a constant voltage source 16 through the bipolar device is given a 2-80mA of constant current, high efficiency LED driver

用led实现16种不同形式的闪速，由vhdl实现-use led to display 16 differce，write in vhdl