Animatronics Project- Nephropoleon

Here is the first semi-successful attempt at animating one of the Morphoids – Nephropoleon.

Nephropoleon panel

And a little about Nephropoleon.  As you can see, the awkwardness is appropriate, but I am still debating whether or not I will attempt to make the movement more efficient.  It could be more efficient, but right now, I’m not totally sure it’s worth the effort.  The nice thing about working with Nephropoleon (and Arduino, actually), is that I have more than one, so could make a second version without destroying this one.  Arduinos are infinitely re-programmable, so I can tweak as much as I need, and re-use the ones I no longer need for another morphoid, or another project.

This particular part of the project has taken me some considerable effort, even though it may not look like it.  I needed to figure out how to build a sufficient structure to hold the mechanical parts so that they would work the best they can.  I had to figure out how to program the Arduino to control the servos to move as they should, in the range and timing that they should, and how to get it to pause the program when there is not enough light- as in, when someone approaches the morphoid.  (This is not evident in the video, but it’s an important part of the project.)  Also, how to deal with seemingly simple things, such as how to turn the power on and battery changes.  It is important that there’s not an obvious opening on the outside, so I’ve actually sewn the battery packs right inside, and needed to come up with a way to have access to the power switch (and be able to find it!) without it being really obvious from the outside.  Also, a big challenge with these is the fact that they’re stuffed- the stuffing interferes with the mechanics on the inside- the resistance is enough to overpower the servos.  I had to rig up a few different ‘guards’ to keep stuffing away from places it might cause problems. I also went through a couple of days of frustration when I kept having a problem where one of the servos wouldn’t work- trying everything, replacing hardware, reprogramming, redoing the circuit, etc.  All the components seemed good, and nothing helped. I only got past it when I started over from scratch, although I still have no idea what the problem was, so hopefully it doesn’t return.

I am learning a lot.

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