Mission 531
Intruder Alert: The Invisible Tripwire Alarm
Badge: Tripwire Spy
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Rig a hidden tripwire across your Lab door that rings an alarm far away.
Someone keeps sneaking into the Lab at night. Stretch an invisible string across the door and catch them.
- New skill Wiring a tripwire to a long-range alarm
- Level 6 · Inventor's Lab
- Difficulty Intermediate
- Mode Creative
- Time 30–40 min
- Ages 13+
What you’ll build
Stretch an almost invisible tripwire across your Lab door and run a long hidden wire to a far-away alarm room. Boost the signal so it makes it all the way, bury the wire, then catch an intruder in the act and learn how spies beat it.
Finish line: Your hidden tripwire catches anyone walking through the Lab door and rings an alarm far away.
Bonus challenge: Add 3 repeaters on 4 ticks so the alarm rings 1.2 s late. The intruder thinks they got away… then the alarm goes off.
You’ll need
- Tripwire hooks
- String
- Redstone dust
- Repeaters
- Note blocks
- A family member as intruder
You choose
- My alarm's code name
- The door I'm guarding
- Alarm sound (the block under the note block decides)
Stuck?
- Alarm silent far away? Dust fades after 15 blocks, so add a repeater before it runs out.
- Hooks must face each other at the same height, both on solid blocks, joined by string.
- Flying over the string won't trip it. Your intruder has to walk.
For grown-ups
Get this mission
This mission is in Mission Pack 53. Each printable has the full steps, a Plan & Log page and a parent page.
Print one mission at a time. You never need to print everything.
Played on Minecraft Bedrock on iPad. Buttons can differ on other devices and versions.