Stack Player is a simple yet creative automation project that plays the popular Stack mobile game automatically using an Arduino and a servo motor.

The idea is straightforward:

The Stack game works on a single tap mechanism.

If we automate the tapping action at the correct interval, the game can be played without human interaction.

What started as a small servo experiment evolved into a product-style hardware build — complete with a custom-designed enclosure manufactured using professional 3D printing services like JUSTWAY.

This project demonstrates:

1. Servo motor control
2. Timing-based automation
3. Mechanical design integration
4. Product-level presentation thinking

Electronics

1. Arduino (Uno / Nano)
2. SG90 Servo Motor
3. Stylus / Capacitive Pen
4. Jumper wires
5. USB cable

Mechanical

1. Custom 3D printed enclosure
2. Servo mounting bracket
3. Screws / Adhesive
4. Tablet or Mobile device

The Stack game requires one tap to drop each block.

To automate this:

1. The servo rotates downward (tap position).
2. The stylus touches the screen.
3. The servo returns to its original position.
4. The process repeats continuously.

Two key angles are used:

1. 125° → Stylus Up
2. 90° → Tap Position

By controlling delay timing, we control stacking rhythm.

1. Servo Red → 5V
2. Servo Brown/Black → GND
3. Servo Orange → Digital Pin 3
4. Connect Arduino via USB

Ensure stable power for smooth servo operation.

1. servo1.attach(3); → Connect servo to pin 3
2. servo1.write(90); → Tap screen
3. servo1.write(125); → Release tap
4. delay() → Controls tap duration and speed

Adjust delays to improve stacking performance.

1. Fix servo securely near the screen
2. Attach stylus to servo arm
3. Align stylus tip with tapping zone
4. Ensure light but consistent contact

Stability is critical. Even small vibrations affect accuracy.

A bare PCB with exposed wires works perfectly for testing.

But when you want to:

1. Present at exhibitions
2. Showcase at demo days
3. Build a portfolio project
4. Make your hardware look product-ready

Presentation becomes critical.

So instead of leaving it as an open circuit, I designed a custom cloud-shaped enclosure.

Design Goals

1. Perfect display alignment
2. Hidden internal wiring
3. Secure mounting structure
4. Smooth, rounded aesthetic
5. Desk-friendly compact size

The objective was simple:

Transform a working prototype into a product-grade build.

To achieve a clean and refined finish, the enclosure can be manufactured using professional services like JUSTWAY.

JUSTWAY provides:

1. Rapid prototyping
2. High-detail resin 3D printing
3. Nylon printing for durability
4. CNC machining for metal parts
5. Injection molding for scaling production
6. Urethane casting for small batches

For projects like Stack Player, professional fabrication ensures:

1. Better surface finish
2. Accurate tolerances
3. Stronger structure
4. Clean, premium appearance

These services don’t change how your circuit works —

they change how your project is perceived.

And in hardware design, perception matters.

A clean enclosure builds:

1. Credibility
2. Confidence
3. Professional appeal

Learning Outcomes

Through this project, you learn:

1. Servo motor control
2. Arduino programming
3. Timing optimization
4. Mechanical alignment
5. CAD design fundamentals
6. Product prototyping workflow

Conclusion

Stack Player started as a simple servo experiment.

But by integrating mechanical design and professional manufacturing, it evolved into something that feels intentional and product-ready.

Great hardware is not just about electronics.

It is about engineering + design + presentation.

And when those elements combine —

even a simple Arduino project can look startup-ready.