Reasons for frequent failure of LED
LED is freeze-sensitive electronic components. 20mA was the maximum value for LED work electronic current . likely to cause the LED failure in the process of using., If the steps are not followed, in some cases the led may not work. This paper analyzes the causations of LED damage,
1, The electricity supply short-circuited has been a sudden rise.
2, Then the slope rises ever more steeply as other device temperature, until it reaches an damage point.
3. There’s a short circuit somewhere in the circuit , caused these current to enhance,
4. The PCB board is taking in water, Water pipes conduct electricity.
5. The missionary hadn’t been wear antistatic clothing and shoes when assemble the led. The operation failed due to led internal damage.

The causes of failure and protection measures taken in the design, fabrication and operation of LED tank were discussed for next article.