What size of 7-segment LED you are using? For "2.3 inch" size I got from different manufacturer (price range from USD$1.5 to USD$3.06 at 1K quantity), the two corners are always darker then the the reset of the same segment.
>直接上12864,很便宜了才6块
For LCD, the operating temperature is a big headache for engineer, most of them are rated 0-60C; some can reach -20 to 70C with a high price;
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木有空间啊,这才是最头疼的地方啊,而数码管管,却可大可小,只要找好了品牌.
>72小时通电高温测过的,也就测过3天吧,至于流明没条件测,我只能靠目测,只能观察是否高亮(这个全靠我自己的眼睛来),看看是否有变暗的,是否有断码的,还好,一切正常....
What size of 7-segment LED you are using? For "2.3 inch" size I got from different manufacturer (price range from USD$1.5 to USD$3.06 at 1K quantity), the two corners are always darker then the the reset of the same segment.
For LCD, the operating temperature is a big headache for engineer, most of them are rated 0-60C; some can reach -20 to 70C with a high price;
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