Coding and electrons building aside, creating the casing and skeleton for the eyes and the tail was quite the task.
I was lucky enough to come across an inheritance of styrofoam which worked well with the casing of both the servo motor and the DC motor.
It was difficult to create space where the motor could reflect a natural tail wag. However, I got as close as I could. On top of the DC motor’s spinning part, I hot glued a red wire. around that, I attached a hollow clear plastic tube about 2-3 cm longer that the red wire. The final iteration features the center bone of a feather. To wag, the red wire sticks into the center of the feather’s backbone, the bone then sits inside the clear tube. When the motor spins, it activates the red wire, which hits the feather and bounces inside the tube, which then shakes the tail. #science
For the eyes, I first created a box in which the eyes couls sit stabilized. A hole fits the servo’s body. The eyes have room to move about 20 degrees. I cut the original eyes out of the stuffed animal and got 22mm acrylic eyes to give the animal a more natural look. The most “real” moment when looking into a dog’s eyes is seeing the white’s of their eyes, as usually the whites do not show. In order to continue with the natural look, I made the eye casing a bit deeper so you look into the eyes. In the image you can see the the “skin” is pulled inward into the eye lids/balls. This gives a deeper and real effect. Although I have had poodles with eyes that pop out of their heads after a nice haircut, it is more natural to lose the eyes in the fluff.
I kept with this casing and eventually added a thin center piece of foam between the eyes for stability.
Here the eyes are moving with a delay between 0-10-20-0 (repeat) degree pattern.
Here they are working in the casing, in the head. #biology
And with the magic of the servo!