A slider crank mechanism is a simple, effective way to convert rotation to linear motion. You can make one very easily out of craft sticks or cardboard, a hole punch, and some paper fasteners.

By attaching the crank shaft stick to a servo motor horn, we can drive our slider crank using a Circuit Playground Express programmed with MakeCode!

Materials

In addition to the parts above, you'll need:

• corrugated cardboard box
• three craft sticks
• brass paper fasteners

Tools

You could build this entire project using only a pair of scissors, but here are some additional tools that can make things a bit easier:

• single hole punch
• hobby knife
• metal ruler
• hot melt glue gun and hot melt glue -- either low or high temperature is fine
• pencil or marker
• small screwdriver