One-Button USB Macro Controller – Arduino Pro Micro

CalaMacro is a compact, single-button USB macro controller based on an Arduino Pro Micro.
It looks like a classic big red button, but once connected to your PC it behaves like a USB keyboard, allowing you to trigger macros, shortcuts, or custom key combinations with a single press.

One button. Endless possibilities.

✨ Features

• Based on Arduino Pro Micro
• Recognized as a USB HID keyboard
• Single large button with mechanical keyboard switch
• Fully programmable via Arduino IDE
• Simple hardware, easy assembly
• Clean and solid 3D-printed enclosure

Perfect for:

• shortcuts and macros
• repetitive actions
• streaming controls
• CAD / editing workflows
• fun desk gadgets

🧩 Required Hardware

This project requires very few components:

• 1× Mechanical keyboard switch
• 1× Arduino Pro Micro
• 4× M2.5 × 6 mm screws
• 2 short wires

No extra electronics, no resistors, no complicated wiring.

🔌 Wiring

The wiring is extremely simple:

• Solder one wire from the switch to GND
• Solder one wire from the switch to pin 2 on the Arduino Pro Micro

The sketch uses the internal pull-up resistor, so no external components are required.

💻 Software

The Arduino Pro Micro is configured as a USB HID keyboard.

• The button is read from digital pin 2
• When pressed, it triggers a keyboard macro
• You can easily modify the sketch to:
  • send key combinations
  • type predefined text
  • add delays
  • adapt it to your personal workflow

📎 The Arduino sketch is included in the project files and ready to upload.

🖨️ 3D Printing Notes

• No supports needed
• PLA recommended
• Fast and easy print
• Two-color prints work great (base + button)

Feel free to customize colors to match your desk or setup.

🔧 Assembly

Assembly is quick and beginner-friendly:

1. Insert the mechanical switch into the printed button
2. Mount the Arduino Pro Micro inside the case
3. Solder two wires between the switch and the Pro Micro (GND + pin 2)
4. Close the enclosure
5. Secure everything with 4× M2.5 × 6 mm screws
6. Upload the provided sketch
7. Press the button and enjoy 😎

🚀 Final Thoughts

CalaMacro is simple, satisfying, and surprisingly powerful.
A single button can dramatically improve your workflow—or just give you an excuse to smash a big red button on your desk.

❤️ Boost

If you like this project and want to support future designs,
a Boost is always appreciated! 🚀
It really helps a lot.

🏷️ Tags

calamacro macro-button macro-pad single-button arduino arduino-pro-micro usb-hid keyboard keyboard-macro mechanical-switch automation desk-gadget 3d-printing maker

Se vuoi, prossimo step:

• versione super-compatta
• cover text ancora più aggressivo
• oppure descrizione SEO-maxata per salire su MakerWorld

Dimmi tu 🦑🔥

scrivi che si possono fare anche scherzi oppure ci possiamo mettere la url dei nostri social, collegarlo alla usb di qualche amico e spammarci sul suo pc

Perfetto 😈 allora aggiungiamo una sezione extra divertente, senza risultare tossici o “meh” per MakerWorld. Ironica, ma ok.

Qui sotto trovi l’articolo aggiornato, con una nuova sezione dedicata a scherzi & social spam integrata bene.
Puoi incollare tutto così com’è.

🔴 CalaMacro

One-Button USB Macro Controller – Arduino Pro Micro

CalaMacro is a compact, single-button USB macro controller based on an Arduino Pro Micro.
It looks like a classic big red button, but once connected to your PC it behaves like a USB keyboard, allowing you to trigger macros, shortcuts, or custom key combinations with a single press.

One button. Endless possibilities.

✨ Features

• Based on Arduino Pro Micro
• Recognized as a USB HID keyboard
• Single large button with mechanical keyboard switch
• Fully programmable via Arduino IDE
• Simple hardware, easy assembly
• Clean and solid 3D-printed enclosure

Perfect for:

• shortcuts and macros
• repetitive actions
• streaming controls
• CAD / editing workflows
• fun desk gadgets

🧩 Required Hardware

This project requires very few components:

• 1× Mechanical keyboard switch
• 1× Arduino Pro Micro
• 4× M2.5 × 6 mm screws
• 2 short wires

No extra electronics, no resistors, no complicated wiring.

🔌 Wiring

The wiring is extremely simple:

• Solder one wire from the switch to GND
• Solder one wire from the switch to pin 2 on the Arduino Pro Micro

The sketch uses the internal pull-up resistor, so no external components are required.

💻 Software

The Arduino Pro Micro is configured as a USB HID keyboard.

• The button is read from digital pin 2
• When pressed, it triggers a keyboard macro
• You can easily modify the sketch to:
  • send key combinations
  • type predefined text
  • add delays
  • adapt it to your personal workflow

📎 The Arduino sketch is included in the project files and ready to upload.

😈 Fun Uses & Pranks

Besides productivity, CalaMacro can also be used for fun stuff 😏

You can program it to:

• automatically type a custom text or joke
• open a URL (for example your social profiles)
• spam a predefined sentence
• trigger unexpected shortcuts

Just plug it into a friend’s PC and…
press the button once 😈

(Use responsibly… or not.)

🖨️ 3D Printing Notes

• No supports needed
• PLA recommended
• Fast and easy print
• Two-color prints work great (base + button)

Feel free to customize colors to match your desk or setup.

🔧 Assembly

Assembly is quick and beginner-friendly:

1. Insert the mechanical switch into the printed button
2. Mount the Arduino Pro Micro inside the case
3. Solder two wires between the switch and the Pro Micro (GND + pin 2)
4. Close the enclosure
5. Secure everything with 4× M2.5 × 6 mm screws
6. Upload the provided sketch
7. Press the button and enjoy 😎

🚀 Final Thoughts

CalaMacro is simple, satisfying, and surprisingly powerful.
A single button can boost your workflow, promote your socials…
or mildly terrorize your friends.

🏷️ Custom Label

Inside the files you’ll also find a small customizable nameplate.

• You can add your own text (name, nickname, macro function, joke, socials, whatever you want)
• Perfect to personalize your CalaMacro
• Easy to print and swap

It’s a small detail, but it makes each CalaMacro unique.