In my previous post, I replaced the electronics of my several-year-old lunar clock design with modern parts. In this post, I’ve replaced the laser cut parts with 3D printed parts, with particular attention to the clip that holds the photo interrupter in place.
I have to confess that sometimes I need a push to make the right design choice.
It’s been a long time – way too long – since I worked on my Lunar Clock project. In the meantime, Sparkfun has introduced new, inexpensive microcontrollers aimed at Internet-of-Things applications. I knew one of those new microcontrollers would be perfect for the Lunar Clock, but I dragged my feet.
In my last post about the Lunar Clock I described the opto-interrupter that will detect the slot in the lunar images disk. At that time I wasn’t sure how to mount the opto-interrupter to the strip that holds the stepper motor that turns the lunar images disk.
Recently I bought an angle bracket to mount the opto-interrupter. Although it’s the smallest bracket I could find, it’s still pretty big, with holes that are far too large for my use.
I’ve been doing a bit of mechanical work on the lunar clock, that I started in my previous post.
As a prototype to help me design the laser-cut parts, I cut out a strip of 1/8″ MDF, cut a square for the motor’s shaft and two holes for the motor mounting holes, then mounted the motor to that strip of wood.