1. Overall Model Overview

This three-dimensional Ethereum commemorative coin light ornament is designed for blockchain and digital asset collectors. The coin disc is paired with a circuit‑patterned base; the front features a faithful reproduction of Ethereum’s iconic diamond symbol, while the surface is encircled by European‑style Latin inscriptions. The inner layer is densely covered with intricate circuit board relief patterns, creating a classic black‑and‑gold color scheme that looks both sophisticated and timeless. Inside the model, a fully hollow mounting compartment has been预留, accommodating the touch‑activated charging light kit shown in the image. Powered via a DC male USB cable, it includes built-in lithium‑ion energy storage and touch‑sensitive lighting control. The base also features a detachable LOGO slot, allowing users to customize it with personalized text or brand logos, making it suitable as a collectible display piece, a desktop ambient lamp, or a business‑oriented commemorative gift.

2. Structure and Internal Compartment Design (with Real‑World Fit‑Test for the Light Kit)

The entire model employs a multi‑part, modular printing structure, consisting of four independent components: a translucent outer cover for the coin face, a hollow internal chamber for housing the lights, a display base, and a replaceable LOGO block. This split‑design addresses issues such as warping during large‑diameter disc printing and size constraints, enabling complete fabrication on standard home desktop 3D printers.

Double‑Layer Hollow Electrical Compartment (Perfectly Compatible with the Light Kit)

The coin body adopts a sandwich‑type hollow structure, providing ample flat space inside to accommodate the full set of components shown in the image: a ring‑shaped LED light panel, a 3.7V lithium battery, a touch‑controlled mainboard, copper‑foil touch sensors, and a DC power input. The interior features carefully planned adhesive zones, allowing the battery and mainboard to be securely mounted at the center of the disc, while the light strip can be neatly wrapped around the inner wall. A dedicated DC charging port is pre‑drilled on the side, with wiring routed in advance to ensure clean, tidy assembly—no exposed wires once the enclosure is closed.

Color‑Separated Relief Sculpting

The yellow translucent outer layer, black relief patterns, and base are printed separately, eliminating the need for post‑printing painting. At the center of the disc, the Ethereum diamond logo, the surrounding Latin inscription, the four corner star symbols, and the multilayered circuit patterns are all rendered as distinct, three‑dimensional reliefs. When illuminated, these textures glow evenly, producing rich layers of light and shadow. The edges replicate the serrated edge of a real coin, delivering an exceptionally realistic tactile experience.

Modular Replaceable LOGO Base

The base features a separate, detachable LOGO slot, compatible with custom‑printed text inserts. Users can freely modify the text content, font size, and even add personalized names, brand slogans, or commemorative messages. The circuit‑board relief patterns on the base harmonize stylistically with those on the coin’s inner layer, ensuring visual consistency throughout the piece.

Stable Vertical Snap‑Fit Assembly

A precisely aligned snap‑fit mechanism on the back of the disc ensures a secure connection with the base slot, without the need for glue. The base has been reinforced with added weight and thickness, so that after installing the complete battery‑light assembly, the center of gravity shifts downward, preventing tipping and ensuring long‑term stability on the desktop.

3. Power Supply and Control Instructions for the Light Kit (Compatible with the DC Charging Accessories Shown)

DC USB Charging Solution

The included charging cable features a USB‑to‑DC round connector. The DC plug enters the mainboard through a pre‑drilled opening on the side of the coin, connecting directly to a standard USB charger to replenish the built‑in lithium battery. The mainboard incorporates overcharge and discharge protection, automatically cutting off power when fully charged. Once unplugged, the battery provides autonomous operation, eliminating the need for continuous external power.

Copper‑Foil Touch Sensor Switch

The kit comes with a copper‑foil touch sensor, which is affixed to the inner surface of the coin during assembly. A gentle touch on the exterior of the coin controls the light—no external buttons required, preserving the coin’s seamless aesthetic while delivering responsive, reliable touch control.

Soft, Even Ring‑Shaped Lighting Effect

The LED light panel is arranged in a continuous circle along the inner wall of the disc, with light radiating evenly through the relief gaps. The overall illumination is soft and non‑glaring, making it an excellent choice as a nighttime ambient lamp for your desk.

4. Recommended 3D Printing Parameters

Material Selection

PLA filament is preferred: use yellow PLA for the translucent outer cover, and black PLA for the relief layers, base, and LOGO insert. For a more realistic gold‑coin texture, consider metallic‑gold PLA, which enhances the metallic sheen when lit.

Print Layer Thickness and Support

A standard layer thickness of 0.2 mm works well, ensuring crisp detail for the fine circuit‑relief patterns without smearing. Only the sharp corners along the disc’s edge require minimal support; the base and hollow interior have no overhanging sections, so support usage is kept to a minimum, saving material and reducing print time.

Assembly and Finishing Tips

After printing, lightly sand the inner walls of the compartment to ensure smooth adhesion for the battery and mainboard. Allow slight interference fits between assembled parts for a snug connection; if greater strength is needed, apply a small amount of glue to reinforce joints.

5. Key Design Features

Custom‑Built Internal Compartment for DC‑Charged Light Kits

The model is natively optimized to house the complete touch‑activated lighting kit shown in the image. All dimensions, wiring ports, and adhesive surfaces are tailored to the component specifications, sparing users from having to manually modify or carve out spaces. With a clear reference to the internal layout, assembly can be completed quickly—even for beginners.

Ethereum‑Specific Circuitry Details

The inner layer of the disc features multiple layers of circuit‑board relief patterns, echoing the blockchain industry theme and setting this piece apart from generic coin ornaments available on the market, thereby enhancing its collectibility and recognition value.

Full Modularity and Customizability

The LOGO block is independently detachable, and its source files allow free modification of text, making it ideal for studios looking to mass‑produce industry‑specific commemorative gifts. The split‑design of the coin body facilitates easy disassembly and replacement of batteries or maintenance of the lighting system without compromising the finished product’s appearance.

Low‑Barrier Split Structure

The large‑diameter disc is divided into two parts—the translucent outer cover and the hollow inner chamber—avoiding issues like warping or deformation associated with monolithic large components, making it accessible even for entry‑level small 3D printers.

6. Applicable Scenarios

Personal Desktop Collection

A glowing decorative piece exclusive to blockchain enthusiasts, illuminating your desk at night as a cozy little nightlight and helping you create a personalized collection display corner.

Corporate/Studio Exhibition Display

A striking visual prop for digital finance firms, blockchain studios, or live‑streaming setups. When lit, it draws attention and elevates the professional ambiance of any space.

Business‑Customized Commemorative Gifts

Replace the standard LOGO text with a customized message, turning this item into a unique keepsake for industry events or company anniversaries, imbued with special commemorative significance.

Trendy Toy Showcases and Window Displays

The luminous gold‑coin design delivers strong visual impact, making it an eye‑catching addition to shop windows or display cases.

7. Complete Assembly Steps

Print the translucent outer cover, the hollow internal chamber, the black base, and the custom LOGO text insert separately.

Insert the LOGO block into the base’s slot to finalize the personalized base.

Referencing the component layout, affix the ring‑shaped LED light panel to the inner wall of the hollow chamber, place the lithium battery and touch‑controlled mainboard centrally within the compartment, and attach the copper‑foil touch sensor to the inner side of the coin cover. Route the DC charging cable through the pre‑drilled outlet at the bottom.

Align the translucent outer cover with the inner chamber’s snap‑fit closure to complete the coin disc assembly.

Engage the rear snap‑fit of the disc into the base’s slot, then position the finished piece on your desk. Connect the USB‑to‑DC cable to the power source to begin charging, and use the touch‑sensitive surface of the coin to control the light.

8. Additional Notes

All components of the model file are structurally complete, and the LOGO text can be freely edited in modeling software. The lighting, battery, and DC charging cable are part of a universal accessory kit; players can simply purchase corresponding parts to achieve perfect compatibility. The model supports personal printing for personal use as well as small‑batch handcrafted customization for sale. Applying a transparent protective varnish after finishing can enhance the translucency and metallic sheen, while also improving durability against wear and fading over time, thus adding triple value as a collectible, decorative item, and ambient lighting piece.