Project image
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$7,072
pledged of $30,000pledged of $30,000 goal
55
backers
Funding Unsuccessful
The project's funding goal was not reached on Fri, February 12 2016 4:47 PM UTC +00:00
Last updated September 9, 2016

Hobby Hand

3D Printed hobbyist hand kit with endless possibilities! Learn about microcontrollers, programming and hardware.

Hobby Hand

3D Printed hobbyist hand kit with endless possibilities! Learn about microcontrollers, programming and hardware.

$7,072
pledged of $30,000pledged of $30,000 goal
55
backers
Funding Unsuccessful
The project's funding goal was not reached on Fri, February 12 2016 4:47 PM UTC +00:00
Last updated September 9, 2016

About

Hobby Hand Assembled with Analog Controller
Hobby Hand Assembled with Analog Controller

Overview

BRG has created a 3D printed robotic hand that better mimics natural hand movement that anyone can easily learn to control.  

We are presenting the Hobby Hand as an open source test bench that will preview technologies borrowed from the Nu-Hand (our previous Kickstarter attempt).  The Hobby Hand is an affordable kit that will aid in the further development of our 3D prosthetic hands.

This platform is ideal for hobbyists, tinkerers, DIYers, and those who are interested in learning about robotics.  The ‘Hobby Hand’ can also be used as an introductory educational platform for programming, micro-controllers, analog sensors, and hardware.

Hobby Hand Design Summary

The Hobby Hand contains 5 servo motors for lateral movement and a servo motor frame that houses 5 additional servo motors for flexion.  A top piece mounts the hand onto the servo motor frame that guides the flexion cables to the servos.  

A servo motor base contains the Arduino mega + servo shield that attaches under the servo motor frame.  This is the 'control' center of the Hobby Hand where all of the motors, sensors and additional peripherals are attached to the board.  

Each finger has a total of 4 bands that saddle the center line (symmetry in plane) to maximize the stability of each finger.  The elastic bands bring the finger back to its original position after closing.  A rear covering is attached to the back of the Hobby Hand frame.

How is the Hobby Hand 'controlled'?

Partially Dissembled to Reveal the Arduino Mega
Partially Dissembled to Reveal the Arduino Mega

The hobby hand utilizes an Arduino mega board, which is an open source micro-controller. The mega board is mated with a sensor shield that has an incredible amount of expandability and flexibility. Consumers can use custom code or code provided by BRG to perform various movements.

Is that a mixer board?

Does Not Quack Like a Mixer Board
Does Not Quack Like a Mixer Board

We have developed an analog board of potentiometers that can control flexion and lateral movement of each finger.

Lateral Movement Controllers
Lateral Movement Controllers

We plan on refreshing the design of the analog controller board to include a 3D printed case and proper knobs as our campaign progresses.

Is it hard to put together?

The unassembled kit requires soldering and the use of basic hand tools (screwdrivers, pliers and scissors).  All kits will include a step by step instruction manual along with tutorials and other resources on our webpage to help you become proficient in no time!

If that is undesirable, we also offer the Hobby Hand assembled and ready to go right out of the box.

Front View (Fully Assembled)
Front View (Fully Assembled)

What else can the Hobby Hand do?

The hobby hand comes with a mini breadboard that is attached to the servo motor frame.  This allows for the addition of extra analog sensors (light, sound, muscle and others), LED's and speakers. Examples will be provided on updates!

Rear View (Turtle Shell)
Rear View (Turtle Shell)

What happens if a component fails on the Hobby Hand?

The great thing about the Hobby Hand is that it is completely modular. Any component can be quickly replaced or even repaired.  A catalog of parts and part numbers will be included in the instructions manual for orders.

The nitty gritty of the Hobby Hand

Materials:  The hobby hand is 3D Printed using PLA (Polylactic Acid), which is a thermoplastic that is environmental friendly (biodegrades in nature without harmful by-products).  

Power:  The Arduino mega requires an external power adapter to drive the servo motors.  A 5V 4 Amp charger is included with the complete Hobby Hand kit. 

Hobby Hand Scale: Is it life sized?  Yes!  The hand was modeled after Tim's own hand and is life sized with roughly the same proportions.

Hobby Hand Movement:  5 servo motors generate lateral motion (side-to-side finger wagging), and 5 servo motors to close each finger.  Each motor can move independently.  

Hobby Hand Grip Strength:  The hobby hand runs off a tension cable that is fixed to a pulley wheel.  The stall torque of each servo motor ranges from 1.8 - 2 kg*cm (1.56 - 1.74 lbs*in).  

Hobby Hand Lateral Strength: The hobby hand lateral movements will be generated using rigid metal rods (similar to RC airplane ailerons).   The stall torque of each servo motor ranges from 1.5 - 1.8 kg*cm (1.301 - .56  lbs*in).

Hobby Hand Weight:  The complete assembly weighs roughly 3 lbs (10 servos, Arduino board, Hobby Hand, base and analog controller).

Hobby Hand Project Timeline

BRG's Hobby Hand Timeline
BRG's Hobby Hand Timeline

 Social Media!

Follow us for the latest and greatest from the Hobby Hand.  We can't do it without your support!

Risks and challenges

The Hobby Hand design is complete. The attachments of the lateral servos will come as an update during the campaign.

A digital instruction manual will be completed before the end of the campaign and will be available on our website. Additional code snippets and tutorials will also be available as well.

We do not foresee any major risks or challenges. However, we are at the mercy of distributors in receiving all of the parts that are included with the hobby hand kits.

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Support

  1. Select this reward

    Pledge $5 or more About $5

    Personalized message from the BRG team.

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    Pledge $35 or more About $35

    Hobby Hand Solo
    Unassembled Hand

    No motors, base or electronics. Just a plastic hand that can move (needs assembly)!

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    Hobby Hand Solo
    Assembled Hand

    No motors, base or electronics. Just a plastic hand that can move, fully assembled!

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  4. Select this reward

    Pledge $105 or more About $105

    Hobby Hand - Lite Kit (NO ARDUINO BOARD)
    Unassembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 5 servo motors (Flexion ONLY), sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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  5. Select this reward

    Pledge $125 or more About $125

    Hobby Hand - Lite Kit
    Unassembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 5 servo motors (Flexion ONLY), Arduino Uno + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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  6. Select this reward

    Pledge $130 or more About $130

    Hobby Hand - Lite Kit (NO ARDUINO BOARD)
    Assembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 5 servo motors (Flexion ONLY), sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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  7. Select this reward

    Pledge $150 or more About $150

    Hobby Hand - Lite Kit
    Assembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 5 servo motors (Flexion ONLY), Arduino Uno + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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  8. Select this reward

    Pledge $155 or more About $155

    Hobby Hand - Full Kit (NO ARDUINO BOARD)

    Unassembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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  9. Select this reward

    Pledge $175 or more About $175

    Hobby Hand - Full Kit

    Unassembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, Arduino Mega + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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    EARLY BIRD SPECIAL!

    Hobby Hand - Full Kit
    Assembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, Arduino Mega + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available. Code provided on our website!

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  11. Select this reward

    Pledge $180 or more About $180

    Hobby Hand - Full Kit
    Assembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available. Code provided on our website!

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  12. Select this reward

    Pledge $200 or more About $200

    Hobby Hand - Full Kit
    Assembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, Arduino Mega + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available. Code provided on our website!

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    Pledge $375 or more About $375

    Pair of Hobby Hands - Full Kits

    2 Assembled Hands (Left and Right) + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors,
    Arduino Mega + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available. Code provided on our website!

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    Hobby Hand Educators Package - Full Kits

    Educators package: 5 assembled hands + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, Arduino Mega + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available. Code provided on our website along with educational tutorials!

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    EARLY BIRD SPECIAL!

    Hobby Hand - Full Kit
    Unassembled Hand + electrical components

    Hobby Hand Solo, servo motor base, 10 servo motors, Arduino Mega + sensor shield, mini breadboard, Analog control board (needs assembly) and potentiometers. Digital instruction manual will be available for assembly. Code provided on our website!

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Funding period

- (45 days)