Published June 11, 2019 © GPL3+

Odin_Companion Bot Crow

A quick build for young makers, who want to make a companion bot.

BeginnerFull instructions provided10 hours3,377

Things used in this project

Hardware components

adafruit trinket v5

Rechargeable Battery, Lithium Ion

SG90 Micro-servo motor

Hand tools and fabrication machines

3D Printer (generic)

Hot glue gun (generic)

Story

A small robot for you, small human. Meet Odin, the small, easy to make companion bot.

I got this idea after Maker Faire Bay Area, where I had a talk with Alex Glow! We talked about our companion bots, little wearable robots you can wear and take places with ya. During my last days in San Francisco, I got to hang with Alex and we talked about how to get other people into making companion bots, and my first thought was giving something for young makers.

I thought up Odin once I got back Home to LA, I was able to take a good look at Archimedes, Alex's Companion Bot, and I loved it so much I based Odin mostly off her design. Kids like birds more then spiders.

Assembly

I tried to make Odin as easy to make as possible. Including the head, it has 6 printed parts to the entire body.

Of course, I recommend starting with the bottom of the print – the base. It's a simple holder with a go pro holder; that way you can fit it on any type of backpack. The neck part is a special because it holds the servo; at this point I recommend printing it and adding the servo to the holder, and attach it to the body. It should look something like this.

Servo attached to bottom

Continue printing out the rest of the parts; I'd say print the head next, and that way you can test the fitting. It should be able to fit right onto the circle of the neck.

When you print the head, you will notice that the head is hollow, that's intentional. Of course it means you have to print it with supports, but the head is hollow that way you can stuff the circuit into the head. This is the diagram I used:

But I used a lithium ion 3.7 volt battery; I also added a led for fun, with a resistor of 33ohms. I always Permaboard attachment pins and then attach the wires together with the power source, I also use hot glue to keep them in.

Example

At this point I recommend uploading the code and giving the system a check. The servo should start moving back and forth. If all is well take the circuit and stuff it inside the head, it all should fit. Lastly Is the decals of the body: the chest and wings.

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I use pretty much the same idea Archimedes has, I just CAD my own version of them. To secure the wings to the head, there are holes I made in the CAD file so you can easily use zip ties:

For the chest piece I just used my good friend hot gLUE, and glued it right under the beak. It should looks something like this.

It's super easy and I even added a switch for the power source.

1 / 2

Of course I recommend painting it – you don't have to keep it crow colors, you can paint it blue, and make it a blue Jay, all up to ya.

Finished

Schematics

Code

Code Odin

// Trinket Servo Monster sketch
// Hardware: Adafruit Trinket (3V or 5V), micro servo, LED + resistor
// Libraries: uses Adafruit_TiCoServo library to manage servo pulses,
// even though NeoPixels are NOT being used here.

#if !defined(__AVR_ATtiny85__)
 #error "This code is for ATtiny boards"
#endif
#include <Adafruit_TiCoServo.h>
#include <avr/power.h>

// Servo parameters.  Pin MUST be 1 or 4 on a Trinket.  Servo position
// is specified in raw timer/counter ticks (1 tick = 0.128 milliseconds).
// Servo pulse timing is typically 1-2 ms, but can vary slightly among
// servos, so you may need to tweak these limits to match your reality.
#define SERVO_PIN  4 // Pins 1 or 4 are supported on Trinket
#define SERVO_MIN  4 // ~1 ms pulse
#define SERVO_MAX 26 // ~2 ms pulse

#define LED_PIN    0 // "Eye" LED is connected here

Adafruit_TiCoServo servo;

void setup(void) {
#if (F_CPU == 16000000L)
  // 16 MHz Trinket requires setting prescale for correct timing.
  // This MUST be done BEFORE servo.attach()!
  clock_prescale_set(clock_div_1);
#endif
  servo.attach(SERVO_PIN);
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, HIGH);
}

uint32_t lastLookTime = 0; // Time of last head-turn

void loop(void) {

  unsigned long t = millis(); // Current time

  // If more than 1/2 second has passed since last head turn...
  if((t - lastLookTime) > 500) {
    if(random(10) == 0) { // There's a 1-in-10 chance...
      // ...of randomly moving the head in a new direction:
      servo.write(random(SERVO_MIN, SERVO_MAX));
      lastLookTime = t;   // Save the head-turn time for future reference
    }
  }

  // Unrelated to head-turn check,
  if(random(10) == 0) { // there's a 1-in-10 chance...
    // ...of an "eye blink":
    digitalWrite(LED_PIN, LOW);  // The LED turns OFF
    delay(random(50, 250));      // for just a short random moment
    digitalWrite(LED_PIN, HIGH); // then back ON
  }

  delay(100); // Repeat loop() about 10 times/second
}

Credits

Jorvon Moss

9 projects • 250 followers

Hi Odd Jayy Here I'm a tinker, who is design to make gadgets and robots, support me http://ko-fi.com/odd_jayy http://patreon.com/Odd_Jayy

Odin_Companion Bot Crow

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Story

Assembly

Custom parts and enclosures

Odin CAD Parts

Odin CAD Parts

Odin CAD Parts

Odin CAD Parts

Odins Head

Schematics

circuit diagram

Code

Code Odin

Credits

Jorvon Moss

Comments

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Odin_Companion Bot Crow

Odin_Companion Bot Crow

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Story

Assembly

Custom parts and enclosures

Odin CAD Parts

Odin CAD Parts

Odin CAD Parts

Odin CAD Parts

Odins Head

Schematics

circuit diagram

Code

Code Odin

Credits

Jorvon Moss

Comments

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