Published April 2, 2019 © GPL3+

Steampunk, Moving Gear Bracelet

Want to kick up your steampunk style? With this Gear Bracelet, you will be able to do just that.

IntermediateFull instructions provided24 hours4,155

Things used in this project

Hardware components

SG90 Micro-servo motor

I used a Continuous rotation servo.

Jumper wires (generic)

Adafruit Trinket - Mini Microcontroller - 5V Logic

Adafruit Lithium Ion Battery - 3.7v 2000mAh

Hand tools and fabrication machines

mini screwdriver

Hot glue gun (generic)

Dremel

3D Printer (generic)

Soldering iron (generic)

Story

This project has been on my mind for months I found a bracelet on Thingiverse made out of gears which I immediately. printed and began wearing and playing with it. its more of a fidget toy something you can turn with your hands, but then I thought, why not add a motor? So I did and the result has been amazing.

Step #1: Print the Bracelet

The bracelet is very easy to print, I sally print it flat, on the print bed with supports. for sizing, I recommend measuring your wrist and making the bracelet about 2 or 5 inches bigger then your wrist, for other humans like myself who have strange wrist, make it as big as you need to, just note you need to fit in the components, and the left over room can be fixed with foam.

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Step #2: Clean the Bracelet

Once you print the bracelet it will have a lot of supports on it, and some of the supports will be in the gears making it impossible for them to move. to fix this mess of a problem I recommend grabbing a X-acto knife, and slowly and carefully begin cutting off the supports and slicing the supports off the gears. To help with the process I recommend slowly and carefully, after you cut the supports off and around the gears slowly try rotation them, but BE CAREFUL you don't want them to break.

Step #3: Test

After the gears are good and ready make sure to twist the gear knob to loosen them up a bit. Just keep spinning it until it feels pretty smooth.

Step #4: Dremel

So this is where things get interesting. There is a visible whole in the knob gear, using a Dremel, or any fast spinning device, and drill through the knob gear till it comes off. Try to make the whole in the bracelet a bit bigger cause it's where the servo going to go.

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Step #5: Circuit

The circuit is pretty simple:

The only thing is that I just took out the LEDs and wired the servo directly to the board. I also added a switch for on and off.

Step #6: Print Enclosure

It's shaped to fit with the bracelet and you should be able to easily glue it to the side.

Step #7: Assembly

This is pretty much what you should have after following the guide thus far. Shove the controller and wires into the container and glue them.

Step #8: The Finish

Make sure you wire the on/off switch on the outside of the container. And if you want to laser cut some foam and glue it to the inside to help hold the bracelet on your wrist.

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Schematics

Code

Gear Bracelet

// 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 • 251 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

Steampunk, Moving Gear Bracelet

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Step #1: Print the Bracelet

Step #2: Clean the Bracelet

Step #3: Test

Step #4: Dremel

Step #5: Circuit

Step #6: Print Enclosure

Step #7: Assembly

Step #8: The Finish

Custom parts and enclosures

Gear Bracelet

Case for the Circuit

Schematics

circuit diagrams,

Circuit Diagram

Code

Gear Bracelet

Credits

Jorvon Moss

Comments

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Steampunk, Moving Gear Bracelet

Steampunk, Moving Gear Bracelet

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Step #1: Print the Bracelet

Step #2: Clean the Bracelet

Step #3: Test

Step #4: Dremel

Step #5: Circuit

Step #6: Print Enclosure

Step #7: Assembly

Step #8: The Finish

Custom parts and enclosures

Gear Bracelet

Case for the Circuit

Schematics

circuit diagrams,

Circuit Diagram

Code

Gear Bracelet

Credits

Jorvon Moss

Comments

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