What's special about this one is that it's easy to make. and if you had any mechanical design knowledge , it can be much more useful
So, let's get started!
Step 1: Requirements
• Laser Machine (we used epilog laser cutter ).
• 3mm wood (30cm X 40 cm ) to make the gears and board.
• Wood rods 10mm diameter cut by saw to make gear handle.
• Sanding paper to finish the parts.
• 10 mm screw and nuts to fix the gears.
You can find the gears and board designs inside the "gears" files in PDF and SVG.