Knock-Off Puzzles with Arduino – Digital Kit for Escape Rooms & Makers

Bring the classic escape room feeling to your own project.
With this digital DIY set, you build an interactive knock puzzle where only the correct knocking pattern leads to success – ideal for escape rooms, secret compartments, chests, or creative tech projects.

Whether behind a wooden wall, in a box, or as a hidden mechanism: The knock puzzle creates excitement, teamwork, and a real "aha" moment.

How the knock puzzle works

A hidden knock sensor (piezo) detects the entered knock signals.
The system measures the time intervals between the knock impulses and compares them with a previously defined pattern.

✔️ Pattern correct → Relay is activated
❌ Pattern incorrect → No action

You can then use the relay to, for example:

• open a secret door
• deactivate an electromagnet
• release a chest
• trigger light, sound, or effects

What you get (digital download)

• 2 ready-made Arduino codes (.ino)
• 1× record knock pattern (Recording Code)
• 1× check knock pattern & switch relay (Checker Code)
• Detailed step-by-step instructions (PDF)
• Bill of materials for all required components
• Tips for use in an escape room
• License agreement for commercial use

No shipping, no physical product – instantly available after purchase.

Special features

• No programming knowledge required
• Knocking pattern can be individually defined
• Tolerance adjustable (for different players)
• Relay output for controlling external components
• Compatible with Arduino Uno, Nano & compatible boards
• Ideal for escape rooms, Halloween installations & DIY projects

Tip: This product is part of our Arduino Escape Room Bundles – 3 puzzles, one download, cheaper than individually.

License & Usage Notes

The included Arduino codes may be used commercially in your own products and escape rooms.
Passing on or selling the code as a standalone product is not permitted.
See the enclosed license agreement for details.

Product Safety

Product type: Digital product (download)
Manufacturer: District 44 GmbH
An der Sportanlage 14
63584 Gründau, Germany
Contact: office@fx-props.de