Please Hammer, Don't Hurt Em

You can build a hole for your dream miniature golf course that has this smashing obstacle -- the Hammer Time hazard! Using cardboard boxes, Crickit, Circuit Playground Express, a gearbox motor, and some craft supplies, you'll create a relentless hammer obstacle that takes just the right timing to avoid that hazard and sink your ball in the hole!


1 x Adafruit CRICKIT for Circuit Playground Express
Crickit: Creative Robotics and Interactive Construction Kit is an add-on to Circuit Playground Express that lets you #MakeRobotFriend using CircuitPython and MakeCode
1 x Circuit Playground Express
Round, Awesome Microcontroller Board
1 x TT Motor DC Gearbox
200 RPM 3 to 6VDC
1 x 3 x AA Battery Holder
with On/Off Switch
1 x Male DC Power adapter
2.1mm plug to screw terminal block
1 x USB Cable
micro USB cable

Materials & Tools

For this project you'll need:

  • Large corrugated cardboard box
  • Small corrugated cardboard box
  • Popsicle stick
  • Toothpick or bamboo skewer
  • Paddle wheel attachment for TT motor or other wheel
  • 2ea. Zip ties
  • Wire twist tie
  • Magic Spring, a.k.a. "Slinky"
  • Golf ball and putter (or you can improvise -- make your own cardboard putter!)
  • Paper cup
  • Hobby knife
  • Pencil
  • Hot glue gun and glue, or white glue and patience
  • Packing tape

This guide was first published on Jul 05, 2018. It was last updated on Jul 05, 2018.

This page (Overview) was last updated on Jul 14, 2020.