Mission 522
Reflex Test: Freeze the Lamps and Prove You’re Fast
Badge: Lightning Reflexes
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Build a lamp-bar timer that freezes on STOP, then race your family.
The lamp lights. You slam the lever. The lamps freeze and tell the truth: how fast are you, really?
- New skill Locking repeaters to freeze a signal
- Level 6 · Inventor's Lab
- Difficulty Intermediate
- Mode Creative
- Time 45–60 min
- Ages 13+
What you’ll build
Build a row of lamps that light up one after another like a timer bar. Lock repeaters freeze the bar the instant the racer flips STOP, so the lit lamps show exactly how fast they reacted. Race each other and work out your true average.
Finish line: Your reaction timer freezes the instant you hit STOP, and you know your average over five tries.
Bonus challenge: Make the bar 30 lamps long and test a sleepy-morning reflex vs an after-snack reflex. Which time of day are you fastest?
You’ll need
- Redstone lamps
- Repeaters
- Redstone dust
- Levers
- A family member as the starter
You choose
- My timer's name
- My guess for my best time: ___ seconds
- The prize for the fastest reflexes
Stuck?
- Bar won't freeze? Each lock repeater must point into the side of a timer repeater.
- Set every timer repeater to 1 tick, so each lamp is about a tenth of a second.
- To reset, switch STOP off first, then GO off.
For grown-ups
Get this mission
This mission is in Mission Pack 52 (Level 6: Inventor's Lab). Its printables arrive in the store soon. We release about one level a month.
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.