2020-06-19 (F) Weekly Summary

I like automation and photography, so a programmable camera base is right up my alley. Of course, these exist, hackers build them, and you can buy them at stores. In this case, someone made an outstanding version based on a giant ball bearing. All too often, projects with a pièce de résistance are impossible for everyone but the builder. Still, this maker included a model to reproduce his bearing and make it accessible to everyone.

I finished the HexShaftMonitor with a few finishing touches, uploaded my code to GitHub, and shot a demonstration video. The last bug was a double-tap on the reed switch every time the magnet passed, but I fixed that by turning it ninety-degrees.
(0:38) Final video for HexShaftMonitor

Now that I had a drill shaft monitor, I was ready to start winding magnet coils. I whipped up a spindle model that used the same hex-shaped hole calculation as the HexShaftMonitor and printed two different sizes.

Magnet winding spools

On one coil, I placed 250 turns and, on another, 100 rotations. I wanted to get a first-hand understanding of what difference this would make. There were a few issues with the winding process. The most frustrating part was keeping the wire in place on the spool.
Winding a coil with HexShaftMonitor

After playing with the first two coils, I learned a few things and used that experience to revise the spindle model. First, I enlarged the hole so I wouldn't destroy anything when I placed it on a shaft and added a couple of little holes near the center where I could thread the start of the wire and keep it from slipping.
Next winding spool design

My magnet winding plans derailed because I had trouble finding time for physical projects. I started a new haptic compass project, which is actually a continuation of my first project on this blog. So far, I still haven't made one that works, but I've picked up a few things since then.

In this iteration, I will embrace electronics instead of ignoring them, and start with something that should already have all the hardware for a wearable version. I can miniaturize if the wearable is a success.

Testing positions for a compass

The rest of the summary posts have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7

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