Light emitting diode characteristics
Compared with the neon and incandescent bulbs, light-emitting diode is characterized by: a low operating voltage (some only a little a few volts); operating current is very small (some only a few tenths of mA can shine); shock and vibration performance good, high reliability, long life.
modulated by a current through the strength can easily modulate the intensity of light emission. Because of these characteristics, light-emitting diodes as a light source in a number of photoelectric control device, the signal is used as a display in many electronic devices. It made the heart tube strips, with strips of light-emitting tubes 7, 7-segment digital semiconductors, each digital displays Arabic numerals 0 to 9, 10 and A, B, C, D, E , F and some other letters (case-sensitive).
