Time Fall - Digital clock with vertical bars

A digital clock with vertical bars.

• The weight of a bar itself moves the neighboring bar when carry up.
• Only one servo motor
• Reduction gears make it possible to raise neighboring bar by the dropping lighter bar (lever principle)
• Easy to adjust the time

Caution : To be honest, making this clock is not recommended because it is very loud when bar drops. The durability of this clock is questionable because impulsive force of dropping bar will damage somewhere. To print the clock with supplied STL files, you need large 3D printer (300x300mm build table).

To design the gears, I used "Precision Gears" addon for Blender, https://makertales.gumroad.com/l/PrecisionGears

How to make

Caution : To be honest, making this clock is not recommended because it is very loud when bar drops. The durability of this clock is questionable because impulsive force of dropping bar will damage somewhere. To print the clock with supplied STL files, you need large 3D printer (300x300mm build table).

Parts:

• One 28BYJ-48 stepper motor with drive circuit comes with
• Arduino or any micro computer
• Lots of 2mm tapping screws
• Sturdy rods (around 4mm) to connect divided bars

How to make:

• Print all parts with flat surface facing down. No supports needed
• Bars and long rack gears should be rotated 45deg on the build plate to fit into the printable area
• Assemble them as shown in the video, using tapping screws
• Connect divided bars with rods and rack gears. I used bamboo rods. Use glue here.
• Glue digits to the rods. Guide holes help the alignment.

Please understand how the clock works before you print. It is not recommended for beginners, so I do not write detailed assembly manual.

If your printer is not capable for the supplied parts, please edit the shape using original Blender file.