1. performance and characteristics of components LED digital tube as described below:

(1) driving under low voltage, low current light, can be compatible with CMOS, ITL circuits.

(2) light emitting extremely short response time (<0. 1 µ s), high-frequency characteristics of good, good monochrome, high brightness.

(3) small size, light weight, good impact resistance.

(4) long life of over 100,000 hours, even up to 1 million hours. Low cost. So it is widely used as digital instrumentation, CNC equipment, computers, digital devices.

2. Performance testing

LED digital tube appearance color uniformity, no local color and bubble-free, dry-cell batteries that are available under amateur conditions for further inspection. We wish to introduce a case study of Yam Digital inspection method.

3 volt dry battery pinout fixed contact in public on the negative terminal of the LED digital tube, battery positive lead wire loop moving contact stroke is extreme. This lead come into contact with a stroke is extreme, it should be shown that stroke. In such a simple way to check whether the digital tube has broken (a stroke cannot be displayed), even (some strokes together), and different strokes can be relatively light and weak performance. Check for common anode led simply reversed the battery negative lead line, as above.