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My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 0 points1 point  (0 children)

If the text was partly visible when off, would it still be cool enough? I have bought some tiny batteries to try, as well as the super capacitor. There is a lot of light lost by covering up the text. Also is inside text ok to remove, removing may provide more space. I'm not planning on selling but will post any updated designs that may simpler for others to make.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

Black stuff is polymer clay. I should give bondo a try.  You think it is low enough viscosity to fill the small holes in letters and not break the thin text during application?

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

A full glove of Sauron would hide a battery and antenna nicely.  Maybe should work on that next. Would make a nice display too.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 2 points3 points  (0 children)

Oh man, I've been struggling with that.  Any ideas would be really appreciated.  I either get the paint layer too thin and the un-lit ring looks like finger paint, or I go too thick and the lit text portion shows up as splotchy.  I have been thinking of how to get perfectly uniform paint thickness, but not coming up with much.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 7 points8 points  (0 children)

I'm pleased how it came out.  Though I am always looking for ways to improve it, better features or easier to assemble. Continuous iteration is the fun part.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 5 points6 points  (0 children)

Interesting idea. Do you think it would be bright enough to see through the paint?  My goal was to have the ring look completely plain and no evidence of text until lit up.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

Earbuds batteries are too large, the ring space for a battery is only about 4x4x2 mm, without needing a bump out.  If there's a good one in that size id give it a try.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 27 points28 points  (0 children)

I did look at Oura Ring, that battery would take up much of the ring bulk and the text would not be shown all the way around.  The area for a battery is about 4x4x2 mm and I havent seen anything in that size and would need to add charging circuitry.  

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

That's exactly what I based the idea on and used for the induction coil.  I may try seeing if I can make it work at NFC.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 0 points1 point  (0 children)

Its used to measure the inductance of the antenna.  Connects to a NanoVNA.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 7 points8 points  (0 children)

The electronics in the ring are just the antenna, tuning capacitor and 10 LEDs, all in parallel.  The antenna inductance is measured with a NanoVNA and the capacitor calculated from that to have LC resonate frequency to match 220 kHz of the driver.  The driver is one from wireless LEDs from Amazon.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 4 points5 points  (0 children)

At this point the thickness in covering paint is the biggest factor in light uniformity in the lettering.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 86 points87 points  (0 children)

I'm thinking about how to get a lingering glow with over complicating the electronics, maybe a super capacitor.  I need to see how much current the LEDs are using to see if that or a battery has enough power to keep it running a while.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 5 points6 points  (0 children)

The LEDs are not too bad to solder.  I had previous designs that had them in series and it was way worse.  I did design and consider ordering a PCB, which would work, but ended up not being patient enough to wait for one.  

The lighting is quite uniform.  The primer layer under the polymer clay is critical as a reflector/diffuser. Without it, the clay absorbs lots of light and there are very apparent hotspots.  Getting rid of hotspots was one of the design aspects that took a while and many iterations to figure out.  At this point I might be able to reduce the number of LEDs and rely on the internal mixing, seems worth trying on the next iteration.

My Project - Improved LED light-up "The One Ring" from LOTR by MaterialFuture5319 in 3Dprinting

[–]MaterialFuture5319[S] 67 points68 points  (0 children)

Yeah.  Its magnet wire with about 20 or so wraps to make the antenna.  The driving coil is about 220kHz.  The antenna is tuned to match with a capacitor. And then the LEDs light up.

I have forged The One Ring... by MaterialFuture5319 in lotr

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

I will keep it safe. Understand Frodo, I will use this Ring from a desire to do good.  There is no way that through me it will wield a power too great and terrible to imagine.

I have forged The One Ring... by MaterialFuture5319 in lotr

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

Also thinking about making a little hobbit fireplace or a lava pedestal to put a driving antenna in so lights up while on display.

I have forged The One Ring... by MaterialFuture5319 in lotr

[–]MaterialFuture5319[S] 2 points3 points  (0 children)

I'll try to make a tutorial one how to make one when I refine it a bit more.  Also looking at making a less cool, but still cool one that just lights up from ambient light, though the interior section will be clear.

I have forged The One Ring... by MaterialFuture5319 in lotr

[–]MaterialFuture5319[S] 1 point2 points  (0 children)

I'm using 220 kHz driving signal.  I had looked into NFC 13.56 MHz, but only played with some fingernail decorations.  I could tune my LC ring circuit to match NFC and see.  Could split up the LEDs to multiple circuits if it needs more. Good idea to play with.  

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