Enclosures and housings
Modular Illuminated Letter B - 4 Puzzle Sections + Rear Locking Plates
- Bounding box
- 582 × 25 × 95 mm
- Engine
- 3D Printing B-rep
- Parameters
- 15
- Published
- November 1, 2026
Download
Free to download and use. See the terms.
The prompt
Create a 3D printable uppercase letter B for a modular illuminated storefront sign. Dimensions: 180 mm height, 125 mm width, 25 mm depth. Divide the letter into exactly four interlocking puzzle sections. Each section must have mechanical dovetail-style joints, 0.25 mm clearance, flat front surfaces, and removable rear locking plates. Create an internal cavity for an 8 mm flexible COB LED strip. Use PETG-compatible wall thickness of 2 mm. Each individual piece must fit within a 220 x 220 x 250 mm 3D printer build volume. Export each of the four pieces as separate STL files.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall letter height | 180 mm | 60 – 250 |
| Overall letter width | 125 mm | 40 – 220 |
| Letter depth, front to back | 25 mm | 10 – 60 |
| Front panel / PETG wall thickness | 2 mm | 1.2 – 5 |
| Joint rim (perimeter wall) width | 8 mm | 4 – 16 |
| LED channel depth into front panel | 3 mm | 1 – 8 |
| COB strip channel height | 8.5 mm | 4 – 20 |
| Joint clearance per side | 0.25 mm | 0.1 – 0.6 |
| Dovetail tab engagement depth | 5 mm | 2 – 10 |
| Dovetail tab base width | 14 mm | 6 – 26 |
| Dovetail tab tip width | 18 mm | 8 – 30 |
| Locking plate width | 40 mm | 15 – 100 |
| Locking plate height | 18 mm | 8 – 50 |
| Locking plate thickness | 3 mm | 2 – 8 |
| Gap between exploded parts | 20 mm | 5 – 80 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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