Start by making the backpack alarm with the light sensor, pulse, and buzzer following the steps here: http://littlebits.cc/projects/backpack-alarm
STEP 2 : PLAY!
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Picture 1
After you test it yourself, try testing it with a friend or two. Can anyone open your backpack without setting off the alarm?
STEP 3 : REMIX: Choose a remix from the steps below!
Now for the real challenge: How can you customize your alarm for different settings?
STEP 4 : REMIX A: Change the Bit settings
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Switch the light sensor mode to DARK to create an alarm that sounds when it is dark. Where could an alarm like this be useful? If your alarm didn't sound reliably, try adjusting the sensitivity of the light sensor. Adjust the speed of the pulse Bit to change how fast the alarm sounds. What setting do you think makes the best alarm?
STEP 5 : REMIX B: Will your alarm work in different places or scenarios?
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Try it in your desk drawer, locker, or under your backpack. Put it on the windowsill as a wake-up alarm. Use it to prank someone when they turn out the lights.
STEP 6 : REMIX C: Make your alarm more effective
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Snap on a DC motor and sign with a scary monster on it. Amplify the sound (try using a paper cup or cone). Add lights.
STEP 7 : SHARE: Promote your invention!
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Create a 30-second commercial explaining how useful it is and upload it to the Invent page at littlebits.cc/invent. LEVEL UP: Write a “product review” in the comments of another alarm on the Invent page as if you were writing it for your favorite tech publication. Don’t forget to be constructive in your feedback :)