Stained glass, light-up earring (christmas tree)

Stained glass light-up earring

Hi! So I have this tradition of making an earring every year for christmas that contains lights.
This year i wanted to make a stained glass motif.

The thought behind the design, is that it is rechargeable, and that one can design more front-panels, and just switch out the design to something that suits the occasion. Not just christmas.

Parts

There are 4 printable files
1x backside with a hole for the USB-C charging port and switch
1x backside with no holes for people to modify according to needs and own internal electronics
1x see-through front panel that interlocks with the backside
1x stained glass design outline

one needs 1x backside, 1x frontpanel and 1x outline

Materials

FDM-printer: The backside and outline are printed with an FDM-printer (in my case an Anycubic Kobra 2 Neo)

Resinprinter: The see-through panel is printed on a resin printer (in my case an Anycubic Photon Mono M5s)
The same effect might be achievable on an FDM-printer with transparent filament, I do not have any, so I havent been able to try.

Transparent Resin: Transparent resin was used to both make the seethrough panel, but also mixed with acrylic inks to create the glass-like effect. If one has a good variety of translucent resins, that will probably be a prefered material over mixing.

Electronics: I work a lot with recycled materials, and both the USB-C charging module and the Lithium-ion battery are reclaimed from vapes I have found on the street. 
The switch i have used is an On-On switch i bought from here: https://www.starelec.fi/product_info.php?products_id=17716 
The cables are reclaimed from discarded electronics
2 LEDs and a 220 ohm resistor

Process

Step 1
Print all the pieces, 1x backside 1x front-panel and 1x outline

Step 2
Glue the outline onto the front-panel
make sure you glue the whole outline, we dont want the resin to seep underneath

Step 3
Once the glue has dried, you can fill the different holes/pockets that the ouline has created with resin. 
I mixed my transparent resin in a 30:1 ratio with Liquitex acrylic inks
I filled all the holes/pockets of the same colour at the same time, then i ran it in my wash&cure station to harden. This to avoid messing up by spilling liquid resin into other uncured pockets.

Step 4
Solder the internals. I have very limited knowledge in electronics, i took it slow, double checked everything with a multimeter. 
Classic, negative to negative, positive to positive. The 2 leds are in parallell inorder to be as bright as possible, and i found through trial and error that a 220 ohm resistor worked well for me, a 1k ohm resistor didnt look to bad either. Your milage may vary.

Step 5 (optional)
I painted the backside with acrylic colours, to look like a gray brick wall. A more knowledgeble person than me might be able to add the stone texture already in the printing step of the process so that it would be easier to paint.

Step 6
Put everything together, like the amateur I am, i hotglued everything in place, and put a bit extra hotglue on the exposed wires, since Lithium batteries scare me, and i dont want anything to short out.
The backside and the front-panel click together nicely, when you want to open it up again, it might help to squeeze to top and bottom of the backside to create a small spring between the frontpanel and backside for easier opening.

Step 7
Drill a hole at the top and attach the earring hardware necessary

Good luck! please share if you choose to make this or make your own stained glass designs!

Yours, 

Elli