This is a real quick project and fun to display. How do those hands stay up?
All the credit for its design goes to Shiura who created it and published his make here: https://www.instructables.com/Hollow-Clock-V/
I followed his design explicitly, with the only change to the stepper motor-to-driver- cable which was too long to insert into the base with the other parts. I cut out 6" or so and re-spliced the wires. I also used a slightly different driver board for the stepper motor. (see images)
All the credit for its design goes to Shiura who created it and published his make here: https://www.instructables.com/Hollow-Clock-V/
I followed his design explicitly, with the only change to the stepper motor-to-driver- cable which was too long to insert into the base with the other parts. I cut out 6" or so and re-spliced the wires. I also used a slightly different driver board for the stepper motor. (see images)
Earlier, and clone versions of this clock, used an Arduino Nano, but this version V5 offers two much smaller microprocessor devices, an RP2040 (known as a Pi-Zero) from Waveshare and an XIA0. I had both in stock! I was more familiar with the XIA0, having made two projects of my own with it, but I wanted to use the RP2040...just because.
This was the first time I printed in two colours (for the same part). The two gears inside didn't print well and were very rough on the surface, so I reprinted with finer resolution, and in different orientation to get a nice smooth gear surface.
This was the first time I printed in two colours (for the same part). The two gears inside didn't print well and were very rough on the surface, so I reprinted with finer resolution, and in different orientation to get a nice smooth gear surface.
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Old style 2003 driver
New style 2003 driver
Gear box and display unit separated
My gearbox. White object at left is part of the stepper motor which drives the two gears.
Image from the Internet