Just impressive how simply you can build a LED: All you need is a Silicon carbide Crystal (e.g. from ebay) and a power supply with current limitation. Also you need pins for electric contacting. In the bottom some pictures showing the 'LED' at work (~20-30V, 30-100mA) :-D
(the pin you can see, is the negative pole)
(http://www.masm32.com/board/index.php?action=dlattach;topic=17461.0;id=9740)
(http://www.masm32.com/board/index.php?action=dlattach;topic=17461.0;id=9741)
(http://www.masm32.com/board/index.php?action=dlattach;topic=17461.0;id=9742)
qWord
one more picture:
(http://www.masm32.com/board/index.php?action=dlattach;topic=17461.0;id=9744)
it doesn't have to be silicon carbide :P
pick one from group 3 and one from group 5 (skipping the transitional metals) ...
(http://www.bbc.co.uk/schools/gcsebitesize/science/images/38_modern_periodic_table_2.jpg)
i know this how ?
i used to work for a company called Three-Five Systems :bg
i had to ask what the name was about, of course
i figured my boss had better know the answer - he was the director of R&D :lol
Quote from: dedndave on September 27, 2011, 07:09:04 PM
it doesn't have to be silicon carbide :P
It could be any semiconductor - however, the band gab should allow emission in the visible light :lol
Quote from: qWord on September 27, 2011, 07:33:47 PM
Quote from: dedndave on September 27, 2011, 07:09:04 PM
it doesn't have to be silicon carbide :P
It could be any semiconductor - however, the band gab should allow emission in the visible light :lol
Infra-Red LEDs are surprisingly useful.... At least as a complete newbie I have never used a visible light LED only an infra-red (as in a WII-Mote).... I guess it's like visual encryption :lol
I used to use I.R. light sources for my photography.
Made for some interesting pictures, both in B/W and color.
Dave was probably into that too.
actually, i always found photography rather interesting
however, with electronics and amateur radio, i had enough expensive hobbies and opted for chess, instead :bg
Quote from: dedndave on September 27, 2011, 07:09:04 PM
it doesn't have to be silicon carbide :P
pick one from group 3 and one from group 5 (skipping the transitional metals) ...
(http://www.bbc.co.uk/schools/gcsebitesize/science/images/38_modern_periodic_table_2.jpg)
i know this how ?
i used to work for a company called Three-Five Systems :bg
i had to ask what the name was about, of course
i figured my boss had better know the answer - he was the director of R&D :lol
silicon carbide is Si-C
Boss state is not a prove.
pick one from group 3 and one from group 5 - it is semiconductor
but Si-C is led like lamp on W