2021年7月13日 星期二

275奈米紫外線殺菌系統第四版

材料與工具介紹





所有的材料

步驟一
測試鋁基板的電路







步驟二
計算限流電阻



步驟三      焊盤上錫



第四步驟
在焊台上焊接UVC LED和限流電阻






錯誤示範: 元件沒有放好  要拿起來重放  不可以在原地回來回去   會造成元件正負極沾錫短路




全部都焊好UVC LED 和限流電阻的鋁基板


 第五步驟    檢查燈板上的限流電阻




第六步驟  檢查焊好的燈板




第七步驟   查修故障的燈板






第八步驟  連接所有燈板















第九步驟   接上電源




第十步驟   測試 上膠固定


第十一步驟    完成





以後  所有口罩  文具    襪子    要自己用紫外線消毒

5 則留言:

ci139 提到...

use your head and youtube (there are exceptions = all things do not apply to all situations + even experienced people may have a "room for improvement" ...)
https://www.youtube.com/watch?v=B3F68ubfBkk (subtitles - CC - can be switched on to better track the text/speech for foreigner)
https://www.youtube.com/watch?v=FFzNVsSw7Gs
https://www.youtube.com/watch?v=-osUZL-JCYE
https://www.youtube.com/watch?v=6rmErwU5E-k basic
https://www.youtube.com/watch?v=N8F6KcfB9Go wre brdn !!!
maybe ( https://www.youtube.com/watch?v=p_BtLvPdMO0 ) T-reflow - soldering -profiling course!

ci139 提到...

your used heat sink is (as far as i get it) designed in speciffc for the
https://cree-led.com/media/documents/data-sheet-JSeries-2835.pdf (see pg. 36 "Recommended Solder Pad"¹(=²))
. . .
your "landing pattern"²(=¹) makes it difficult to solder the https://www.mqcob.com/en/Products/Electric_box/20200420/109.html
---------
PS! https://en.wikipedia.org/wiki/Ultraviolet#Human_health-related_effects

we had a https://en.wikipedia.org/wiki/Red-eared_slider that tolerated the UV-B http://www.exo-terra.com/en/products/linear_fluorescent_bulbs.php + anything else might be not too good to "look at"

PS! https://www.google.com/search?q=led+cautions+eye+vision
especially the human eye is not designed for the UV range and you tend to estimate it's https://en.wikipedia.org/wiki/Radiant_flux by it's seeming https://en.wikipedia.org/wiki/Luminous_flux

ci139 提到...
作者已經移除這則留言。
ci139 提到...

a way to test most LED-s :

(link to) a falstad simulation

PS! Do NOT test high power LED-s when they are NOT mounted to the heat sink
// an excessive junction temperature may cause the component damage or increase it's aging rate ... there is also a possibility of a skin burn - the least applies for the limiting resistor also - which power range must be selected to be at least 1.5x (3/2x) higher the Imax²·R
// see basics +
Figure R1-13. (about "power reserve" for the resistor ... however the PTC of the resistor may provide extra current limiting but it must be within a (failure) safe margins of the particular resistor -or- the appropriate PTC resistor must be used instead)

( For the 1.4V to 5V LED-s a single 6LF22 is sufficient -- the near empty 9V battery has an increased internal resistance and may drop it's terminal voltage near and below the 6V when loaded)

ci139 提到...

(i always forget something)
PS! the uv-LED model used in falstad simulation is "illustrative" = it does NOT correspond to any existing REAL device - so , it cannot be used for design purposes e.g. you can't make a grid(circuit) in falstad using that LED model and expect your actual LED to behave the same way !!!