Brackets and mounts
Retro Handheld Music Player (Exploded Parts)
- Bounding box
- 1055 × 100 × 21 mm
- Engine
- 3D Printing B-rep
- Parameters
- 63
- Published
- November 7, 2026
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The prompt
## Forge CAD prompt – handheld retro music player Design a compact, premium-looking handheld MP3 player with a 70 × 100 × 18–20 mm target enclosure. Overall design - Portrait-oriented rectangular cuboid with rounded corners. - Minimalist retro hi-fi aesthetic, inspired by premium brushed aluminium audio equipment. - Silver metallic finish, dark screen bezel and subtle detailing. - Slim, pocketable construction with no unnecessary bulk. - Two-piece enclosure: front shell and removable rear cover. Front - 2.4-inch, 240 × 320 SPI TFT display, positioned centrally. - Five physical buttons beneath the screen: - Previous track - Next track - Menu - Back - Auxiliary button (function undecided) - Buttons should be slightly recessed or protected against accidental presses. Rotary encoder – important design change - Position the EC11 rotary encoder at the top-right corner on the rear face, behind the screen. - Design a small, ergonomic recess around it so the user's thumb naturally rests on the knob when holding the player. - Use a low-profile, textured metallic knob. - Do not place the knob on the front face or use the previous bottom-left corner cut-out design. - Ensure sufficient internal clearance for the encoder and its mounting. Internal components\ Design space for: - ESP32-WROOM-32 DevKit V1 - 2.4-inch TFT display - MicroSD reader - PCM5102 DAC - EC11 rotary encoder - Five tactile push buttons - IP5306 battery module - 3.7 V LiPo battery - Perfboard-based wiring Sides - Accessible 3.5 mm AUX port. - USB charging/programming port. - Physical power switch. Construction - Target 18–20 mm total thickness. - Use internal mounting posts and screw bosses. - Include a removable rear panel for maintenance. - Protect and secure the battery. - Keep the ESP32 antenna clear of metal and other components. - Position the DAC close to the AUX connection. - Allow access to the microSD card. Important CAD requirements - Do not invent component dimensions. Use actual measurements or clearly marked placeholders. - Check for component collisions, cable clearance and assembly access. - Prioritise a compact internal arrangement before finalising the exterior. - Produce an isometric assembly view, front view, rear view, side views and an exploded assembly view. Design priority: A slim, premium, portrait-oriented music player with a front screen, five physical buttons and a rear upper-right thumb-operated rotary encoder.
Parameters
| Name | Value | Range |
|---|---|---|
| Gap between parts in the exploded row | 20 mm | 5 – 60 |
| Enclosure width | 70 mm | 40 – 120 |
| Enclosure height | 100 mm | 60 – 160 |
| Front shell depth | 12 mm | 6 – 20 |
| Rear cover thickness | 7 mm | 3 – 15 |
| Body corner radius | 8 mm | 2 – 20 |
| Wall thickness | 2 mm | 1.2 – 5 |
| Screw boss diameter | 6 mm | 4 – 10 |
| Boss inset from outer edge | 8 mm | 5 – 16 |
| Cover screw clearance hole | 2.8 mm | 2 – 4 |
| Boss pilot hole | 2.2 mm | 1.5 – 3.5 |
| Screen centre height offset | 12 mm | -20 – 40 |
| Screen window width | 40 mm | 20 – 60 |
| Screen window height | 52 mm | 20 – 80 |
| Bezel recess width | 50 mm | 24 – 66 |
| Bezel recess height | 60 mm | 30 – 90 |
| Bezel recess depth | 1.2 mm | 0.2 – 3 |
| Button row height offset | -28 mm | -45 – -5 |
| Button spacing | 11 mm | 8 – 20 |
| Button counterbore depth | 1.5 mm | 0.5 – 3 |
| Button through hole | 6.2 mm | 4 – 9 |
| Encoder X on rear cover | 17 mm | -30 – 30 |
| Encoder Y on rear cover | 30 mm | 0 – 45 |
| Encoder body width | 12 mm | 8 – 20 |
| Encoder body height | 7 mm | 4 – 15 |
| Encoder shaft diameter | 6 mm | 3 – 8 |
| Encoder shaft length | 8 mm | 3 – 15 |
| Knob diameter | 14 mm | 8 – 24 |
| Knob height | 6 mm | 3 – 12 |
| Thumb recess diameter | 24 mm | 14 – 36 |
| Thumb recess depth | 2.5 mm | 0.5 – 6 |
| Display module width | 43 mm | 20 – 60 |
| Display module height | 70 mm | 30 – 90 |
| Display module thickness | 5 mm | 2 – 12 |
| Switch body size | 6 mm | 4 – 10 |
| Switch body height | 3.8 mm | 2 – 8 |
| Button cap diameter | 4.5 mm | 2 – 8 |
| Button cap height | 1.2 mm | 0.4 – 4 |
| DevKit width | 30 mm | 15 – 45 |
| DevKit length | 52 mm | 25 – 70 |
| DevKit PCB thickness | 1.6 mm | 0.8 – 3 |
| Header stack height | 11 mm | 4 – 16 |
| MicroSD module width | 20 mm | 10 – 35 |
| MicroSD module height | 15 mm | 8 – 30 |
| DAC board width | 25 mm | 12 – 40 |
| DAC board height | 15 mm | 8 – 30 |
| Charger board width | 25 mm | 12 – 40 |
| Charger board height | 20 mm | 10 – 35 |
| 3.5 mm jack body diameter | 6 mm | 4 – 10 |
| LiPo width | 50 mm | 20 – 66 |
| LiPo height | 60 mm | 20 – 90 |
| LiPo thickness | 6 mm | 2 – 12 |
| Perfboard width | 55 mm | 20 – 66 |
| Perfboard height | 70 mm | 20 – 92 |
| Perfboard thickness | 1.6 mm | 0.8 – 3 |
| Hole pitch | 2.54 mm | 1.5 – 5 |
| Hole diameter | 1 mm | 0.4 – 2 |
| I/O carrier board width | 60 mm | 30 – 90 |
| I/O carrier board depth | 16 mm | 8 – 30 |
| USB opening width | 9 mm | 5 – 14 |
| USB opening height | 7 mm | 3 – 12 |
| Power switch width | 8 mm | 4 – 14 |
| Power switch height | 4 mm | 2 – 10 |
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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