Spending too many hours in front of your computer without moving?

StandUp Reminder is a simple, compact 3D-printed timer that helps you remember to get up every 45 minutes, promoting better posture, circulation, and mental clarity.

Whether you’re working, studying, or gaming, this little device will support healthier habits and keep your body from suffering the consequences of sitting too long.

🔧 Key Features:

Seamless Display – For a continuous and immersive viewing experience. The borderless design gives the product a sleek, modern look, perfect for elegant setups and clean, professional workspaces.

45-minute countdown – Pre-set for the optimal break interval. (customizable with Arduino IDE)

One-button activation – Uses a simple big button to start and stop the countdown.

Seamless 4-digit LED display – Powered by the TM1637 module for smooth and readable time display.

Visual-only alert – No sound or vibration, making it perfect for shared or quiet workspaces.

“Look At Me” Mode – When the countdown reaches zero, the display blinks 00:00 for 10 seconds. If not reset within this time, the timer enters an attention-grabbing state, flashing random characters rapidly to break through tunnel vision and help users in deep focus recognize the alert through peripheral awareness.

📖 How It Works

Using the StandUp Reminder is simple and intuitive:

Power it up – Once connected to power, the display will show 45:00, indicating the preset countdown time.

Start the timer – Press the button once to begin the countdown.

Break time alert – When the timer reaches 00:00, it starts blinking for 10 seconds.

Press the button during this phase to reset the timer back to 45:00 and start a new session.

Reset anytime – If you decide to take a break before the countdown ends, simply press the button and the timer will reset to 45:00, ready for the next cycle.

Customize the time – You can easily change the countdown duration in the Arduino code. The relevant sections are clearly commented to make quick editing hassle-free.

🛠 Project Development with PCBWay’s Support

A massive thank you to PCBWay for helping bring this project to life.

PCBWay specializes in PCB, PCBA, CNC, and 3D Printing, and has (in my experience) the best support & the widest amount of options for manufacturing. 

They also have a PCBWay+ Store where I purchased the Arduino NANO at a great price!

In addition to the essential components for this build, range of electronic parts and accessories at great prices, with an easy checkout process and fast, well-packaged shipping. 

⚙ Slicer Settings:

Material: 

PETG for Spring - PLA for the rest

Layer Height: 0.2 mm

Infill: 25–50% 

Supports: Yes, for the Main Body and Button (follow .3mf file configuration for painted support)

🖨 Print Files & Quantities:

1× Main Body

1× Back Cover

1× Arduino Support Bracket

1× Button Guide 

1× Button 

1× Spring

⚠Warning! It is important that at least the first two layers of the ‘Main Body’ are printed using a light-colored, white or translucent material, as shown in the photos and assembly guide.

🔩 Hardware Required:

1× Arduino NANO

1× TM1637 Display

4× M3 Threaded Inserts

4× M3x6 Screws

1× Microswitch Omron D2F

1× 3x6 Screws

Connection Wires

Follow the assembly guide in the download section for all information regarding the assembly and the Arduino program.

🧠 Why It Matters:

Sitting for too long can impact your health, concentration, and posture. With StandUp Reminder, you’ll get a gentle push to take care of your body, without distractions or overcomplicated features.

Set it once. Stand up when the timer ends. Feel better throughout the day.

♻ Remix & Customize

Feel free to modify the code to change the timer interval or add features like, buzzers, or haptic feedback.

If you do, consider uploading a remix, I’d love to see your version!

🐾 Follow for More

Don’t forget to follow 3D KIMBA for more projects, creative ideas, and helpful tools for makers!