At 18:40 the negative resistance observed is quite interesting. Could it be some self heating that increases electron mobility? Or any other solid state process suddenly becomes relevant. I wish I paid more attention to physics class a couple years ago
would like to see modern high brightness leds at my local retailer for electronic components i can buy 100k mcd red, yellow, green leds, 60k mcd blue, 80k mcd cold white and 110k mcd warm white they are like half a $ each once i touched by accident a green led onto like 14v source it died but after that it was "still working" in a way that the die or the bonding wire was i guess glowing yellow while eating like 7w after while it just exploded
I enjoyed the video I enjoyed the content and I loved all the gear but what I can't understand is why this video happens to only be in mono since I'm only hearing the Left Channel? 😄
I wonder if, you place a large value electrolytic capacitor that is pre charged into the liquid nitrogen with a volt metre attached to see it's voltage before and after, I would expect to see a rise in voltage as the capacitor cools down and begins to shrink. Since the electric charge can't be compressed, it has to go somewhere else and we should see a voltage rise on the meter! The capacitors that you tried in this video showed a drop in capacity when cooled, so that should mean that if the capacitor already had a charge on it, as the capacitor shrinks, it has to get rid of the extra charge and therefore we should see the voltage rise above what you initially charged it to.... Otherwise, the extra charge would have to be lost as heat to the nitrogen if a rise in voltage is not detected..... This would be an amazing experiment.....
@@GearAcquisitionSyndrome excellent! I think that the results would help with understanding what the electric charge is and how it behaves under certain circumstances..... I will be waiting for your next video with anticipation.... Thanks for all your hard work and effort that you have put into this....
All this talk of band gaps... Random thought: What do you reckon are the chances of a 3d printable P/N junction one day... Very cool stuff here with LN2
Sorry for the late reply. I'm pretty sure that physics and metallurgy say you can't 3D print a junction. But silicon is made with lithography, which is akin to printing
interesting! I've seen green LEDs turn yellow under normal room-temp conditions when over-currenting them. Hadn't really thought of *why*, other than "it's about to burn out!" I've been surprised to see a few survive. I wonder if that weird curve and color change you saw in liquid nitrogen is a scaled version of what we'd see at room temp, if the experiment could be precise-enough not to burn it out. I've also seen a blue LED fade toward greenish as the capacitor in the powersupply discharged. (I have a vid or two, but it's hard to see). Sort of the reverse-effect, though: a longer wavelength with (presumably) decreased current/heat(/voltage?). I've only seen one that did this, and unfortunately don't have a part number. Though, it makes me wonder if your uneventful blue LED experiments might've been moreso under different conditions (e.g. more/less current?). Next time I've got some liquid nitrogen to play with, I'll be remembering this vid, thanks!
