Progress Bar Timer 3D Printed Part

Latest Version: V0.2

Changelog:

• Adjusted dimensions
• Added lithophane
• Added software features like flashlight, timer loop, timer settings, etc
• Added phone storage box

Project Introduction

FocusBarTimer is a **full-stack open-source** minimalist timer. There's no urgency of digital jumps, only a progress bar made of 10 full-color LEDs, allowing you to feel time flow while concentrating. This page provides all files for the accompanying **3D Printed enclosure**

Use cases: Pomodoro Technique / Deep concentration / Anti-phone distraction / Minimalist desktop decor / Personalized DIY gift

✨ Highlight: Replaceable lithophane panel

This is the most distinctive design feature of the FocusBarTimer enclosure—the **lithophane panel is held in place by the top cover, which can be removed by hand, allowing for quick panel changes**:

• Tool-free replacement — Remove top cover → Change panel → Replace top cover, done in seconds
• lithophane glowing effect — Translucent PLA printed patterns, which glow when LEDs illuminate, creating a great ambiance
• Fully customizable — The lithophane pattern is generated from images; create anything you like: text, logos, geometric patterns, cute pets...
• Change panels to match your mood — Print a set of "Work / Study / Meditation" themed panels and swap them according to your state

💡 Welcome to upload your exclusive lithophane panel designs to MakerWorld and co-create with the community!

📐 lithophane Panel Creation Tutorial

The lithophane panel is a single-piece structure; the lithophane and lens frame are combined into one during printing. The production process is described below, based on Bambu Studio

Component description

Component	Description
Lithophane sheet	The part that carries the pattern, generated by MakerLab from an image, with thickness variations creating the light-transmitting effect
Lens, hollow	The frame base of the panel, into which the lithophane is embedded to form a single piece

Production steps

Step 1: Generate the lithophane sheet

1. Open Bambu Studio, go to the top menu "MakerLab" → "Lithophane Generator"
2. Upload your desired image (image source idea: you can have AI generate images with specific aspect ratios)

3. Set dimension parameters:

   Parameter	Value
   Width	94 mm
   Height	19 mm
   Outer Margin	0

4. Click generate, export .3mf file

Step 2: Assemble into the lens frame

1. In Bambu Studio, open the lithophane 3MF exported in Step 1
2. Drag the **[Lens-Hollow]** model file provided in this project into the same project
3. Align and embed it into the lens frame—the lithophane surface faces outwards (LED light illuminates from the back)

Step 3: Slice and print

1. Slice and print according to the default parameters for lithophane

📱 Phone lock storage box

Insert the timer into the storage box, and focus automatically begins. Pull it out, and it automatically stops

Can't resist checking your phone while concentrating? This storage box acts as a **physical barrier** against that impulse

Usage is simple:

1. Put your phone in the box
2. Insert the timer into the storage box opening — All buttons are pressed down → **Pomodoro timer starts automatically** (default 25min+5min)
3. When concentration ends, pull out the timer → **Automatically stops**

The back of the box has a charging port, allowing your phone to charge while "in confinement". Messages still pop up, but you can't reach your hand in

💡 It doesn't lock you in—it gives you a few extra seconds to hesitate, allowing reason to overcome impulse

Printing Recommendations

The model is optimized for low printing difficulty. Model files are included in the .3mf, allowing for one-click slicing and printing

Enclosure Features

• Precise fit — Custom-designed for the FocusBarTimer PCB, with accurately aligned button holes, LED windows, and Type-C interface
• Simple design — Straight-line flat design, takes up minimal desk space, and the LED progress bar is clearly visible
• Modular structure — Split design, including bottom shell, top cover, and replaceable lithophane panel; the top cover can be removed by hand, making panel changes very convenient
• no supports printing — Proper orientation, no support material needed, high printing success rate
• Material versatility — PLA / PETG both work; lithophane requires specific colored materials (PLA recommended)

File Description

This model includes the following files:

File	Content
*.3mf	Pre-sliced file (Bambu Studio), includes recommended printing parameters, one-click printing
*.stl	Universal engineering format, can be imported into any CAD software for modification

📌 When creating the lithophane panel, simply use MakerLab to generate the lithophane sheet, then assemble it into the lens-hollow frame and print, see the creation tutorial above

Related Resources

This is only the **enclosure part** of this project; the complete project also includes:

Content	Address
🔌 PCB hardware project	LCSC EDA Open Source Community
💻 Firmware source code	GitHub - ShixianLab/FocusBarTimer
🎬 Demo video	Bilibili Demo

For the complete replication tutorial, see docs/BUILD_GUIDE.md in the firmware repository

🛒 Don't want to bother yourself? You can find me

Printing the enclosure is just the first step; subsequently, you'll need to make PCBs, procure components, solder... If you want a ready-to-use product, you can contact me:

• PCBA (circuit board with all components soldered, battery not included) — Ready to use out of the box, just connect a battery and it works
• PCBA + Enclosure (battery not included) — Ready to use upon arrival, enclosure can be regular or with a custom lithophane panel

Lithium batteries are not included due to shipping restrictions; you can purchase a 3.7V lithium battery yourself (available on various platforms, approximately ¥5-15)

👉 Go directly to e-commerce platforms and search for the store **"Shixian Workshop"** to place an order

Main Functions (Complete Unit)

After printing the enclosure, purchasing PCB components, and flashing the firmware, you will have a timer with the following functions:

• 10 WS2812 RGB full-color LED progress bar — Lights up one by one, colors gradually change with progress
• 5 preset durations — 5 / 10 / 15 / 25 / 30 minutes, one-click start
• Pomodoro mode — Focus ⇄ Rest automatic cycle
• Colorful lighting effects — Breathing / Meteor, one-click switch during focus
• Buzzer reminder — End-of-phase sound effect, can be muted
• Flashlight mode — Double-click for full bright white light
• Ultra-low power consumption — Automatically enters standby after 30 seconds of inactivity, standby current ≈2μA
• USB + lithium battery dual power supply, with power indicator
• 📱 Phone lock storage box — Matching 3D printed storage box; the timer plug automatically starts when inserted, and stops when removed, providing a physical barrier against the urge to check your phone

Required Hardware (Complete Unit List)

Component	Model/Specification	Reference Price
Main Control MCU	PY32F002B (TSSOP-20)	¥1~2
RGB LED	WS2812 5050 × 10	¥2~5
Charging Management	TP4056 Module	¥1~3
Lithium Battery	3.7V 300~500mAh	¥5~15
Passive Buzzer	12mm Piezoelectric	¥1
PCB Prototyping	Minimum 5 pieces	¥5~20
Other Components	Resistor/Capacitor/Button/Type-C	¥3~5
Total		¥20~45

Open Source License

This project (including the enclosure model) adopts the CC BY-NC 4.0 license

• ✅ Allowed: Personal printing, modification, distribution
• ✅ Allowed: Non-commercial derivative works (with attribution)
• ❌ Prohibited: Commercial sale (including sales of printed products)

Made with ❤️ by ShixianLab