How to distinguish the positive and negative poles of SMD LED lamp beads
2020-04-10
Many packages, like some 0603, 0805 and other SMD LEDs, will have a green "T" symbol on the bottom. One horizontal side of the "T" is the positive pole, and the other side is the negative pole. Some SMD LEDs will be marked with a silk screen similar to a triangle symbol, so the bottom side of the triangle is close to the positive pole, and the top corner is close to the negative pole. The lead of the light-emitting diode is generally longer at the anode and shorter at the cathode.
2020-04-14
When it comes to the grievances and hatreds of white LEDs, we cannot fail to mention RGB and white LEDs. The two have the same goal in different ways. They all hope to achieve the effect of white light, but one is directly presented in white light, and the other is in red, green and blue. Mixed light; one said that the other party's purity was not enough and the price was too expensive, the other retorted that he was beautiful in color, and criticized the other party for being old and declining. I am afraid that such a war will not stop in the short term.
2020-04-14
The "New Coronavirus Infection Pneumonia Diagnosis and Treatment Plan (Trial Version 5)" pointed out that the new coronavirus is sensitive to ultraviolet light. Recent studies have found that there is a correlation between the new coronavirus and the SARS coronavirus. Therefore, in theory, the scientific and rational use of ultraviolet light can effectively inactivate the coronavirus.
The impact of the new coronavirus pneumonia epidemic on the LED industry chain
2020-04-14
The new coronavirus epidemic spread rapidly before the lunar new year. To control the epidemic, the government first announced the implementation of "closure" measures on several Hubei cities led by Wuhan, and then successively removed Beijing, Shanghai, Shenzhen and other provinces, counties and cities. Incorporated into closed management, and extended the Lunar New Year holiday, and did not officially resume work until February 10.
2020-04-14
On April 2, the National Standardization Management Committee issued an announcement announcing the postponement of the implementation of 13 national standards including the "Limited Values and Energy Efficiency Ratings of Unitary Air Conditioners".
It has proven useful! UV LED can kill 99.9% of coronaviruses in 30 seconds
2020-04-14
Seoul Viosys and SETi announced that Vio LEDs UV LED technology successfully killed 99.9% of the new coronavirus (COVID-19) within 30 seconds.
According to the news, the research team of Seoul Viosys and Korea University (Korea University) used the Violeds compound semiconductor technology in mass production for testing.
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