We print ears on the 3D printer or our Kote against the Japanese MiMi
Animatronics - the creation of mobile robots that mimic the movement of living beings, real or fictional.
A little more than a year ago I was shown a concept video from “necomimi” - a frankly Freakovsky gadget. These are cat ears, controlled by brain signals, read by two neurosensors. Very emotional toy. At first, I wanted to buy it and disassemble it somehow. Why different? I looked at a lot of videos about these "Mimi" on the network and realized that firstly the ears move only in one plane, which looks like something constrained. Real Koshars move their ears in all degrees of freedom. And secondly, these neurosignals with neurosensors are some kind of dubious technology. Small girls hardly managed to move their ears, no matter how they wrinkled their forehead, trying to imagine an ice cream cone. One even cried.
')
Everything will be different for us: the ears will move freely in two planes, and we will manage them by simply pressing a button on the remote. And for each button we will invent and program our special effect. In short. Let's assemble a simple animatronic robot, programmed for movements that mimic the movement of cat ears.
What do we need?
1. Microcontroller Arduino Nano or MP1511 from MasterKit
2. Four servos. Micro or mini. 180 degrees.
3. Five buttons and a switch
4. Power supply 5-6 V (four finger batteries or better still a power bank for a smartphone)
5. A bit of wire, soldering iron
6. Thread with a needle
7. Two flaps of felt fabric of different colors
8. A couple of hours of free time
9. But the most important thing is access to a 3D printer. On it we will print the frame of the ears and kinematics.
10. Free evening))
The files of the lugs, the frame and the rim for fastening the servos are laid out in the form of STL files on our website on this page . They are adapted for printing on the MC3. But, by the way, they can be printed on any 3D printer. The housing for the controller and buttons, everyone can come up with himself.
Build Kinematics
When all parts are printed, proceed to the assembly. The kit for each ear consists of three parts: the ear itself and two parts for mounting servomotors.
We fasten a screw with a nut for servomotor parts as shown in the figure. There should be two symmetrical frames:
Fasten the servos to the previously made frames as shown in the pictures. We need three screws - two large and one small (servos always come complete with screws). Two large screws are screwed on the servo itself, and on a small rocking chair to its axis.
We attach the ears
The first step is to center the axes. The servo axis can only move 180 degrees. We put a long rocking chair on the axis, carefully scrolling the axis, we find the extreme points, draw the axis to the middle, pull out the rocking chair and reinstall it perpendicular to the body of the servo machine. The second servo that will be mounted on the bezel is centered in the same way.
Further, through the hole in the platform for attaching the servo with a small screw, fasten the machine on the ear. Carefully look at the pictures:
The ears are attached to the bezel with a small screw through the hole. For a complete understanding, consider the pictures:
As a result, we obtain:
Electrical circuit
The servos of the lugs are controlled by an Arduino Nano or MP1511 controller. Sketches for downloading to Arduino microcontrollers can also be downloaded from our website .
Please note that servos have a ground-power-data layout, while RAMPS and the MP1511 that inherited it have power-to-EARTH-data! Connect properly!
For the ears were designed 5 special effects, each of which is activated by pressing a button. It is: waving with the left ear, waving with the right ear, waving with both ears, both ears dropping, both ears rising. But you can come up with your own effects and remake the sketch.
Now compare.
Our Kote:
Japanese MiMi:
Material provided by our DIY-direction - Master Kit.
A little more than a year ago I was shown a concept video from “necomimi” - a frankly Freakovsky gadget. These are cat ears, controlled by brain signals, read by two neurosensors. Very emotional toy. At first, I wanted to buy it and disassemble it somehow. Why different? I looked at a lot of videos about these "Mimi" on the network and realized that firstly the ears move only in one plane, which looks like something constrained. Real Koshars move their ears in all degrees of freedom. And secondly, these neurosignals with neurosensors are some kind of dubious technology. Small girls hardly managed to move their ears, no matter how they wrinkled their forehead, trying to imagine an ice cream cone. One even cried.
')
Everything will be different for us: the ears will move freely in two planes, and we will manage them by simply pressing a button on the remote. And for each button we will invent and program our special effect. In short. Let's assemble a simple animatronic robot, programmed for movements that mimic the movement of cat ears.
What do we need?
1. Microcontroller Arduino Nano or MP1511 from MasterKit
2. Four servos. Micro or mini. 180 degrees.
3. Five buttons and a switch
4. Power supply 5-6 V (four finger batteries or better still a power bank for a smartphone)
5. A bit of wire, soldering iron
6. Thread with a needle
7. Two flaps of felt fabric of different colors
8. A couple of hours of free time
9. But the most important thing is access to a 3D printer. On it we will print the frame of the ears and kinematics.
10. Free evening))
The files of the lugs, the frame and the rim for fastening the servos are laid out in the form of STL files on our website on this page . They are adapted for printing on the MC3. But, by the way, they can be printed on any 3D printer. The housing for the controller and buttons, everyone can come up with himself.
Build Kinematics
When all parts are printed, proceed to the assembly. The kit for each ear consists of three parts: the ear itself and two parts for mounting servomotors.
We fasten a screw with a nut for servomotor parts as shown in the figure. There should be two symmetrical frames:
Fasten the servos to the previously made frames as shown in the pictures. We need three screws - two large and one small (servos always come complete with screws). Two large screws are screwed on the servo itself, and on a small rocking chair to its axis.
We attach the ears
The first step is to center the axes. The servo axis can only move 180 degrees. We put a long rocking chair on the axis, carefully scrolling the axis, we find the extreme points, draw the axis to the middle, pull out the rocking chair and reinstall it perpendicular to the body of the servo machine. The second servo that will be mounted on the bezel is centered in the same way.
Further, through the hole in the platform for attaching the servo with a small screw, fasten the machine on the ear. Carefully look at the pictures:
The ears are attached to the bezel with a small screw through the hole. For a complete understanding, consider the pictures:
As a result, we obtain:
Electrical circuit
The servos of the lugs are controlled by an Arduino Nano or MP1511 controller. Sketches for downloading to Arduino microcontrollers can also be downloaded from our website .
Please note that servos have a ground-power-data layout, while RAMPS and the MP1511 that inherited it have power-to-EARTH-data! Connect properly!
For the ears were designed 5 special effects, each of which is activated by pressing a button. It is: waving with the left ear, waving with the right ear, waving with both ears, both ears dropping, both ears rising. But you can come up with your own effects and remake the sketch.
Now compare.
Our Kote:
Japanese MiMi:
Material provided by our DIY-direction - Master Kit.
Source: https://habr.com/ru/post/377273/
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