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You want to encourage guests, colleagues, friends and family to be happy? You need a Smile Activated Marshmallow Launcher. The Raspberry Pi powered "SAML" detects a smile and then launches a marshmallow at it - happiness pays off!

Step 1: Components, Software and Tools

Picture of Components, Software and Tools

To create your SAML you'll need:


  1. Raspberry Pi Model 3 -
  2. MotoZero motor controller -
  3. Micro Metal Gearmotor -
  4. 4xAA Battery Holder -
  5. Webcam
  6. Monitor
  7. Wifi Dongle
  8. Keyboard
  9. Mouse
  10. USB and Power Cables for Raspberry Pi
  11. Wire
  12. 4 AA Batteries
  13. Toy Catapult
  14. Coat Hanger
  15. String
  16. Safety Pin
  17. Solder
  18. Duct Tape
  19. Marshmallows!


  1. Raspbian -
  2. Open CV - Open Source Computer Vision -
  3. Smile Detection Software - download from .zip file below


  1. Soldering Iron
  2. Small Screwdriver
  3. Wire Stripper
  4. Wire Cutter
  5. Scissors
  6. Pliers

Ready? OK - next step...

k24tea1 year ago

Smart, creative, and fun. I like this! I know a few people I'd like to encourage to smile. But I smile a lot (idiot grin) so maybe I should make it for ME! I'd want a self-loading automatic launcher. Mmmmmm, marshmallows make me smile! Pow! Mmmmm, marshmallows ...

Fun idea! I'd smile a lot if it got me marshmallows :)

BenBrabyn (author)  Penolopy Bulnick1 year ago

Thanks Penelopy!