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!
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
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)
(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 !!!
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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!
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
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)
(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 !!!
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