Snack Jar Alarm with ShakeUp

Learn to make a snack jar alarm with ShakeUp to protect your snacks!

Written By: Cherie Tan

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Sick and tired of your snacks going missing? Then this guide is for you!

 In this guide, you will learn to make a snack jar alarm with the ShakeUp, by using a simple but cool Scratch trick together with some conductive tape and alligator clips. 

Complete this guide to protect your snacks.

Step 1   Examine your snack jar

  • Take a look at your snack  jar. 
    Does it have a lid that can be twisted and/or lifted off?
    Where does the lid meet the rim?

Step 2   Paste conductive tape

  • If so, attach conductive tape around the rim of the lid where it meets the top of the jar.

Step 3   Attach thin jumper wire lead to conductive tape

  • Use a jumper cable! Connect it to the conductive tape.

Step 4   Attach alligator clip to jumper cable

  • Get out an alligator clip and attach it to the end of the wire as shown.

Step 5   Clip alligator clip to ShakeUp space input

  • Next, attach the other end of the alligator clip to the ShakeUp's 'Space' input

Step 6   Add conductive tape to jar

  • Now add more conductive tape. Attach a piece of conductive tape as shown in the picture, where it runs from the inside all the way to the outside of the jar. 
  • Make sure the two lines of conductive tape meet.

Step 7   Attach another alligator clip

  • Add another alligator clip to the lot. Attach one end of the alligator clip to the conductive tape you just added to the jar.
  • Then make sure the other end of the alligator clip, is attached to 'Earth' on the ShakeUp.

Step 8   Scratch

  • Connect the ShakeUp to your computer by using a microUSB cable
  • Open up the Scratch editor.
  • Grab a 'when green flag is clicked' block from 'Events'. 
  • Then grab a 'forever' block from 'Control. 
  • Next, get an 'if ... then ... else ... ' block. Place this under 'forever' block. 
  • Next, create a condition! We want to make it so that when the space input is pressed (lid attached to jar), no sound is played from the alarm. So get out a 'key space pressed?' block from 'Sensing' tab. 
  • Then from 'Sound' tab, get 'stop all sounds' block and place it in 'if'. 
  • Next, get a 'play sound ... until done' block and place this under 'else'. 
  • Finally, you can record your own alarm sound by clicking on 'record ... ' as shown in the second picture. Now when the lid is taken off, your treats are safe from harm as the alarm will sound.
  • You can download the Scratch code, here: Snack Jar Alarm Project.sb3 

    Replace the sound with your own recorded sound.
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