From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

cstanton — Wed, 01 Apr 2026 22:50:48 GMT

Current Revision posted to Documents by cstanton on 4/1/2026 10:50:48 PM

What if your alarm clock launched a rocket instead of playing a gentle tone? In this project, Milos turns the LEGO NASA Artemis SLS into a motorised, Arduino-powered alarm clock that raises the rocket and blasts a megaphone when it’s time to wake up. The build combines a NEMA 17 stepper motor, relays to hack a megaphone, an LED matrix display, Wi-Fi control, and a custom web interface so you can configure everything from your browser.

Watch the Lift-Off!

https://youtu.be/Qg7JDSrsakI

Building the World’s Loudest LEGO Alarm Clock

When Milos set out to build a new alarm clock, he did not start with typical design constraints like size, comfort, or subtlety. Instead, he started with a simple premise: rockets are among the loudest human-made machines ever created. That idea quickly evolved into a LEGO NASA Artemis rocket that would not just look the part, but behave like a launch sequence every morning.

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

The project began with the LEGO NASA Artemis Space Launch System set. While assembling it, Milos discovered a mechanical detail that set the tone for the entire build: a tiny internal gear designed to rattle during operation to mimic the sound of launch vibration. That detail pushed the concept from a simple motorised display to a full alarm clock experience.

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

The design goals quickly became clear:

Motorise the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

Originally, the plan was to use a megaphone capable of playing MP3 files via USB. The delivered device did not match expectations. Instead of USB playback, it only supported record and playback through a microphone. What initially looked like a setback became one of the project’s most interesting design decisions.

The limitation actually made the system more flexible and tactile. Any sound could be recorded directly into the megaphone and replayed as the alarm. This gave the clock a unique personality and avoided the complexity of integrating audio playback electronics.

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

This approach essentially turned the megaphone into a remotely controlled device. The Arduino does not generate audio; it triggers the megaphone’s existing circuitry in the correct sequence. It is a clean example of hardware hacking that avoids reinventing functionality already present in consumer electronics.

Electronics Architecture and Control Strategy

At the center of the build sits an Arduino Uno R4 WiFi. The choice of board was deliberate: the project requires multiple GPIO pins, relay control, motor control, Wi-Fi connectivity, and a web interface.

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

#define RECORD 3
#define PLAY 4
#define TRIGGER 5
#define STOP 6

The firmware also defines a complete stepper motor configuration:

#define STEP_PIN 9
#define DIR_PIN 8
#define ENABLE_PIN 7
#define LIMIT_SWITCH_MIN 11
#define LIMIT_SWITCH_MAX 12

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

Rather than mounting the stepper motor visibly on the side, Milos redesigned the drive path so the motor sits beneath the rocket base. He created a 3D-printed coupler that connects a NEMA 17 stepper motor to the LEGO gear train.

This preserves the visual integrity of the LEGO set while still using the original gearing. It also highlights a recurring theme in the project: keep the LEGO aesthetic intact while embedding real engineering underneath.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

The enclosure itself was printed in black PLA and dimension-ed using LEGO’s standardised spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronisation via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

#define NTP_SERVER "pool.ntp.org"
#define GMT_OFFSET_SEC 0
#define DAYLIGHT_OFFSET_SEC 3600

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behaviour:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

As the real Artemis mission prepares for launch, Milos discovered that the biggest challenge in building his own morning “launch system” wasn’t the mechanics or the code, it was the wiring. Packing everything neatly into the enclosure turned into the most time-consuming part of the build. As he admits, “The wiring was definitely the most tedious part of the whole project.” That challenge reflects the wider balance he was aiming for: something bold and loud enough to wake you instantly, but reliable enough to run every single day.

The decision to control the megaphone using relays captures that mindset perfectly. Instead of redesigning the megaphone electronics, Milos focused on a practical solution that works consistently and keeps the build approachable for others to recreate.

This isn’t a finished idea either. Milos already sees the project as something to keep evolving. “There are definitely more things I want to add later,” he says, with plans to keep experimenting with the web interface, motion behaviour, sounds, and general refinements to the enclosure and wiring.

Even now, the project works exactly as intended: a dramatic, over-the-top alarm clock inspired by a real rocket launch. With the Artemis mission on the horizon, it feels fitting that this LEGO SLS now delivers its own daily countdown and liftoff on the desk.

Supporting Links and Downloads

- Episode 701 Resources

www.youtube.com/watch

Bill of Materials

Product Name	Manufacturer	Quantity	Buy Kit
Arduino Uno R4 WiFi	Arduino	1	Buy Now
4 Channel Relay Module	SEEED Studio	1	Buy Now
NEMA 17 Stepper Motor - FIT0278	DFROBOT	1	Buy Now
Black PLA - MP010755	MULTICOMP PRO	1	Buy Now

Additional Parts

Product Name	Manufacturer	Quantity
SLS LEGO Set - https://www.lego.com/en-us/product/nasa-artemis-space-launch-system-rocket-42221
Battery Powererd Megaphone
Quad LED Matrix Module - MAX7219
A4988 Stepper Motor Driver
A4988 Adapter Board
Push buttons
Wires
Screws M3 and M4

Tags: arduino alarm clock tutorial, arduino nema 17 stepper tutorial, arduino web server project example, lego motorised rocket arduino, arduino stepper motor project tutorial, diy loud alarm clock project, arduino uno r4 wifi projects, arduino relay control tutorial, diy arudino clock with wifi, arduin projects for beginners and makers, lego arduino integration project, led matrix clock arduino tutorial, hot to control megaphone with arduino, lego alarm clock project, diy smart alarm clock arduino, friday_release

From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

cstanton — Thu, 12 Feb 2026 11:32:20 GMT

Revision 5 posted to Documents by cstanton on 2/12/2026 11:32:20 AM

Watch the Lift-Off!

https://youtu.be/Qg7JDSrsakI

Building the World’s Loudest LEGO Alarm Clock

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

The design goals quickly became clear:

Motorise the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

Electronics Architecture and Control Strategy

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

#define RECORD 3
#define PLAY 4
#define TRIGGER 5
#define STOP 6

The firmware also defines a complete stepper motor configuration:

#define STEP_PIN 9
#define DIR_PIN 8
#define ENABLE_PIN 7
#define LIMIT_SWITCH_MIN 11
#define LIMIT_SWITCH_MAX 12

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

The enclosure itself was printed in black PLA and dimension-ed using LEGO’s standardised spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronisation via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

#define NTP_SERVER "pool.ntp.org"
#define GMT_OFFSET_SEC 0
#define DAYLIGHT_OFFSET_SEC 3600

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behaviour:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

Supporting Links and Downloads

- Episode 701 Resources

Bill of Materials

Product Name	Manufacturer	Quantity	Buy Kit
Arduino Uno R4 WiFi	Arduino	1	Buy Now
4 Channel Relay Module	SEEED Studio	1	Buy Now
NEMA 17 Stepper Motor - FIT0278	DFROBOT	1	Buy Now
Black PLA - MP010755	MULTICOMP PRO	1	Buy Now

Additional Parts

Product Name	Manufacturer	Quantity
SLS LEGO Set - https://www.lego.com/en-us/product/nasa-artemis-space-launch-system-rocket-42221
Battery Powererd Megaphone
Quad LED Matrix Module - MAX7219
A4988 Stepper Motor Driver
A4988 Adapter Board
Push buttons
Wires
Screws M3 and M4

From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

e14sbhargav — Thu, 12 Feb 2026 11:32:20 GMT

Revision 6 posted to Documents by e14sbhargav on 2/12/2026 11:32:20 AM

Watch the Lift-Off!

https://youtu.be/Qg7JDSrsakI

Building the World’s Loudest LEGO Alarm Clock

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

The design goals quickly became clear:

Motorise the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

Electronics Architecture and Control Strategy

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

#define RECORD 3
#define PLAY 4
#define TRIGGER 5
#define STOP 6

The firmware also defines a complete stepper motor configuration:

#define STEP_PIN 9
#define DIR_PIN 8
#define ENABLE_PIN 7
#define LIMIT_SWITCH_MIN 11
#define LIMIT_SWITCH_MAX 12

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

The enclosure itself was printed in black PLA and dimension-ed using LEGO’s standardised spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronisation via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

#define NTP_SERVER "pool.ntp.org"
#define GMT_OFFSET_SEC 0
#define DAYLIGHT_OFFSET_SEC 3600

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behaviour:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

Supporting Links and Downloads

- Episode 701 Resources

Bill of Materials

Product Name	Manufacturer	Quantity	Buy Kit
Arduino Uno R4 WiFi	Arduino	1	Buy Now
4 Channel Relay Module	SEEED Studio	1	Buy Now
NEMA 17 Stepper Motor - FIT0278	DFROBOT	1	Buy Now
Black PLA - MP010755	MULTICOMP PRO	1	Buy Now

Additional Parts

Product Name	Manufacturer	Quantity
SLS LEGO Set - https://www.lego.com/en-us/product/nasa-artemis-space-launch-system-rocket-42221
Battery Powererd Megaphone
Quad LED Matrix Module - MAX7219
A4988 Stepper Motor Driver
A4988 Adapter Board
Push buttons
Wires
Screws M3 and M4

From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

cstanton — Thu, 12 Feb 2026 10:06:31 GMT

Revision 4 posted to Documents by cstanton on 2/12/2026 10:06:31 AM

Watch the Lift-Off!

Building the World’s Loudest LEGO Alarm Clock

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

The design goals quickly became clear:

Motorise the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

Electronics Architecture and Control Strategy

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

#define RECORD 3
#define PLAY 4
#define TRIGGER 5
#define STOP 6

The firmware also defines a complete stepper motor configuration:

#define STEP_PIN 9
#define DIR_PIN 8
#define ENABLE_PIN 7
#define LIMIT_SWITCH_MIN 11
#define LIMIT_SWITCH_MAX 12

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

The enclosure itself was printed in black PLA and dimension-ed using LEGO’s standardised spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronisation via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

#define NTP_SERVER "pool.ntp.org"
#define GMT_OFFSET_SEC 0
#define DAYLIGHT_OFFSET_SEC 3600

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behaviour:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

Supporting Links and Downloads

- Episode 701 Resources

Bill of Materials

Product Name	Manufacturer	Quantity	Buy Kit
Arduino Uno R4 WiFi	Arduino	1	Buy Now
4 Channel Relay Module	SEEED Studio	1	Buy Now
NEMA 17 Stepper Motor - FIT0278	DFROBOT	1	Buy Now
Black PLA - MP010755	MULTICOMP PRO	1	Buy Now

Additional Parts

Product Name	Manufacturer	Quantity
SLS LEGO Set - https://www.lego.com/en-us/product/nasa-artemis-space-launch-system-rocket-42221
Battery Powererd Megaphone
Quad LED Matrix Module - MAX7219
A4988 Stepper Motor Driver
A4988 Adapter Board
Push buttons
Wires
Screws M3 and M4

From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

cstanton — Thu, 12 Feb 2026 09:57:16 GMT

Revision 3 posted to Documents by cstanton on 2/12/2026 9:57:16 AM

Watch the Lift-Off!

Building the World’s Loudest LEGO Alarm Clock

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

The design goals quickly became clear:

Motorise the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

Electronics Architecture and Control Strategy

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

#define RECORD 3
#define PLAY 4
#define TRIGGER 5
#define STOP 6

The firmware also defines a complete stepper motor configuration:

#define STEP_PIN 9
#define DIR_PIN 8
#define ENABLE_PIN 7
#define LIMIT_SWITCH_MIN 11
#define LIMIT_SWITCH_MAX 12

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

The enclosure itself was printed in black PLA and dimension-ed using LEGO’s standardised spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronisation via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

#define NTP_SERVER "pool.ntp.org"
#define GMT_OFFSET_SEC 0
#define DAYLIGHT_OFFSET_SEC 3600

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behaviour:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

Supporting Links and Downloads

Bill of Materials

Product Name	Manufacturer	Quantity	Buy Kit
Arduino Uno R4 WiFi	Arduino	1	Buy Now
4 Channel Relay Module	SEEED Studio	1	Buy Now
NEMA 17 Stepper Motor - FIT0278	DFROBOT	1	Buy Now
Black PLA - MP010755	MULTICOMP PRO	1	Buy Now

Additional Parts

Product Name	Manufacturer	Quantity
SLS LEGO Set - https://www.lego.com/en-us/product/nasa-artemis-space-launch-system-rocket-42221
Battery Powererd Megaphone
Quad LED Matrix Module - MAX7219
A4988 Stepper Motor Driver
A4988 Adapter Board
Push buttons
Wires
Screws M3 and M4

From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

cstanton — Thu, 12 Feb 2026 09:24:20 GMT

Revision 2 posted to Documents by cstanton on 2/12/2026 9:24:20 AM

Watch the Lift-Off!

Building the World’s Loudest LEGO Alarm Clock

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

audio

The design goals quickly became clear:

Motorize the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

audio

Electronics Architecture and Control Strategy

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

These outputs allow the Arduino to emulate the physical button presses required to operate the megaphone.

The firmware also defines a complete stepper motor configuration:

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

audio

Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

audio

The enclosure itself was printed in black PLA and dimensioned using LEGO’s standardized spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronization via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behavior:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

Several reflections from the transcript highlight the practical challenges of the build.

Wiring complexity was a major hurdle:

“The wiring was definitely the most tedious part of the whole project.”

audio

Another recurring theme is the balance between creativity and practicality. The project had to be loud and dramatic, but also reliable and repeatable.

The choice to simulate button presses with relays is a strong example of this balance. It avoids reverse-engineering the megaphone’s circuitry while still achieving full automation.

Future Improvements and Ideas

The transcript hints at potential future expansion of the project. Milos discusses refining the system and experimenting further with sounds and automation.

He notes:

“There are definitely more things I want to add later.”

audio

Possible areas for future development include:

Additional automation features in the web UI
More advanced motion sequences
Additional sound profiles
Further refinement of the enclosure and wiring

The project already functions as a complete alarm clock, but its modular architecture leaves room for iteration.

Final Thoughts

This build is a strong example of combining off-the-shelf hardware, custom firmware, and creative mechanical integration into a cohesive project.

The alarm clock is not just loud; it is theatrical. The mechanical motion, the relay-controlled megaphone, and the web-configured automation all contribute to a wake-up experience that is difficult to ignore.

For anyone attempting a similar build, the most important takeaways are:

Repurpose existing devices when possible
Prioritize reliability for daily-use projects
Preserve aesthetics while hiding engineering beneath
Use software to make hardware flexible

In the end, the project delivers exactly what it set out to achieve: a LEGO rocket launch that starts the day whether you are ready or not.

From Snooze to Launch: The Arduino-Powered LEGO Alarm Clock Inspired by Artemis 2 -- Episode 701

cstanton — Wed, 11 Feb 2026 17:13:53 GMT

Revision 1 posted to Documents by cstanton on 2/11/2026 5:13:53 PM

MR23 – World’s Loudest LEGO Alarm Clock

The result is a project that blends mechanical LEGO engineering, Arduino automation, reverse-engineered consumer electronics, and a web-based control interface.

From Rocket Inspiration to Alarm Clock Concept

In the transcript, Milos reflects on how the idea escalated beyond a simple novelty:

“I wanted something that would actually force me to wake up… something you cannot ignore.”

audio

The design goals quickly became clear:

Motorize the LEGO launch mechanism
Add a display and controls
Create an alarm that is impossible to sleep through

The third requirement became the defining challenge of the project.

Solving the Sound Problem: The Megaphone Hack

But controlling the megaphone electronically introduced a major obstacle: it was designed for manual button presses.

Milos explains the workaround clearly:

“The megaphone is designed to be used by pressing the buttons… so I soldered wires in parallel with the buttons and used relays to simulate the presses.”

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Electronics Architecture and Control Strategy

From the code, the relay pins controlling the megaphone buttons are defined explicitly:

These outputs allow the Arduino to emulate the physical button presses required to operate the megaphone.

The firmware also defines a complete stepper motor configuration:

The presence of limit switches is a key safety and reliability feature. The mechanism cannot overrun its physical bounds. This is critical for a device that operates unattended every morning.

Milos notes in the transcript how important reliability was:

“This has to work every day without me touching it, otherwise it defeats the purpose of an alarm clock.”

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Mechanical Integration: Driving LEGO from Below

One of the most thoughtful aspects of the build is how the motor integrates with the LEGO model.

He explains this design decision in the transcript:

“I didn’t want the motor visible anywhere… everything had to stay hidden under the model.”

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The enclosure itself was printed in black PLA and dimensioned using LEGO’s standardized spacing, making the mechanical alignment straightforward.

Software Design and Web Interface

The software side of the project is far more sophisticated than a typical Arduino alarm clock. The firmware includes Wi-Fi connectivity and a full web interface.

Key features of the firmware include:

Static IP configuration for easy access
Web-based alarm scheduling
Time synchronization via internet
Relay testing and calibration tools
Stepper motor min/max configuration
LED matrix brightness control

From the code:

This enables automatic time updates using NTP, eliminating the need to manually set the clock.

The web interface is designed to complement physical controls rather than replace them. Physical buttons remain available for emergency silence when the megaphone begins blasting in the morning.

Sequencing the Wake-Up Routine

The firmware reveals how the alarm sequence is orchestrated.

Timing constants define the startup behavior:

This suggests a carefully choreographed sequence:

Trigger megaphone playback via relay sequence
Run the stepper motor to animate the rocket mechanism
Maintain motion for a fixed duration
Allow manual stop if needed

The combination of mechanical motion and amplified audio turns the wake-up routine into a full launch event.

Challenges and Lessons Learned

Several reflections from the transcript highlight the practical challenges of the build.

Wiring complexity was a major hurdle:

“The wiring was definitely the most tedious part of the whole project.”

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Another recurring theme is the balance between creativity and practicality. The project had to be loud and dramatic, but also reliable and repeatable.

The choice to simulate button presses with relays is a strong example of this balance. It avoids reverse-engineering the megaphone’s circuitry while still achieving full automation.

Future Improvements and Ideas

The transcript hints at potential future expansion of the project. Milos discusses refining the system and experimenting further with sounds and automation.

He notes:

“There are definitely more things I want to add later.”

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Possible areas for future development include:

Additional automation features in the web UI
More advanced motion sequences
Additional sound profiles
Further refinement of the enclosure and wiring

The project already functions as a complete alarm clock, but its modular architecture leaves room for iteration.

Final Thoughts

This build is a strong example of combining off-the-shelf hardware, custom firmware, and creative mechanical integration into a cohesive project.

For anyone attempting a similar build, the most important takeaways are:

Repurpose existing devices when possible
Prioritize reliability for daily-use projects
Preserve aesthetics while hiding engineering beneath
Use software to make hardware flexible

In the end, the project delivers exactly what it set out to achieve: a LEGO rocket launch that starts the day whether you are ready or not.