Originally published at: https://boingboing.net/2019/12/01/this-guy-hand-makes-and-sells.html
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wait a minute, this is a “Giant LED” but the actual Light Emitting Diode at the center is a normal LED. Everything is 10X scale except the part that is emitting the light.
So this is a “model” of an LED. Or did I miss something here?
Anything larger than a 5mm LED is usually just a 5mm LED in a larger housing.
When a giant LED reminds you of your childhood:
It actually emits a whole lot of 6250 nm light. He scaled everything!!
Yeah, I was expecting a scratch-built LED that used a big slice of semiconductor or something, too.
When I think of a “model” (in the sense of a re-scaled display object), I expect all the parts of the thing to be equally scaled. Which isn’t the case here. So surely that makes it a (regular-sized) LED with just a giant housing that resembles a scaled-up LED? (Yo dawg, I heard…)
I want a giant breadboard, a giant 555 chip, and giant resistors and capacitors! Would settle for giant alligator clips.
And I wonder where you will clip those.
Dirty ticket.
Exactly. I too feel rick-rolled by this headline.
To alligators,duh.
#thanksForTheSetUp
I know where you can get the giant 555.
You’re in luck.
https://www.evilmadscientist.com/2013/555-kit/
And it’s functional, too.
(Looks like @RexDart beat me to it.)
I don’t have an authoritative list of ‘standard’ die sizes(if they have even been standardized); but higher wattage LEDs are almost always physically larger dies(or multi-die packages being sold by aggregate output, 3-5w almost certainly larger die; eBay special ‘100w’ almost always array+optimism). From the pictures on the page this certainly appears to be a smaller LED mounted in a big diffuser; but it looks like a surfacemount in the punchier-than-5mm size.
Some fine person put together a small list of LEDs and die sizes, by way of reference.
That is amazing!
Approves
so we have all discussed our disappointment at it not being a sized up one for one component clone of a smaller and some have come forward to show us all how anything larger than 5mm is usually a clump of 5mm, so I wonder (and sorry if I missed it in the comments) is a larger sized LED even doable?
just wondering if the physics would make the electricity needed too much or would it need too much compensation for heat, etc.
I think it is mainly because of the thermal issues. Even with very active cooling, 5 x 5 mm LEDs are a bitch to keep cool at higher drive currents, whereas an array of 1 mm diodes that’s 5 x 5 is pretty easy to keep happy.
It’s very do-able to power very large arrays, so I don’t think it’s just about the power supply.
ETA: It’s also about the distribution of electrical power on the diode. Since LEDs are semiconductors, the voltage drop across a large LED is significant. In order to feed current evenly across a large surface, you’d need to form a grid of power distribution across the surface in order to even out the voltage drop. As a result, your conductor grid would block out a lot of the LED’s light. This is avoided on small LEDs by wire bonding with tiny little conductors. Less light is blocked by opaque metal conductors that way.
thanks for the helpful detailed reply =D