Week #17

Applications and Implications

In this week we need to propose a final project that integrates the range of units covered, and the project should incorporate:

We need to answer on the below questions:

Individual Assignment

What will it do?

Before joining the Fab Academy course, I was thinking of making a robot that moves away from tires, has legs. So, I wanted my final project to be this robot;
And as I'm a FabLab Master, where I teach students about digital fabrication and robotics; And how to make their own projects. So, I decided to make a HEXI Robot which is an educational robot to teach students about robotics and how to build them.

Who has done what beforehand?

Before starting my project, I did a search for people who made this robot, and I found many makers.
I was looking for a four-legged robot that is controlled by an app on the phone, and I found the following:

My final project is different in many ways:

  • I built a custom mobile app for it. It contains the commands I need to move the robot and the interface is basic and user friendly.
  • Most of what I have seen on the Internet of four-legged robots were without a clear shape or features that indicate the robot, but rather four legs with wires sticking out from the middle.
    Because my project is educational for kids, I tried in the design to make it features and to color it in beautiful colors.
  • I designed a unique PCB looks like the robot, it can handle 12 servo motors and one analog input with bluetooth pins.
  • It is good to teach kids in a way without small pieces or dangerous objects for them, so I designed the robot that it can be assembled without any screws or glue, rather is based on fitting all parts together.

  • What will you design?

    I will design the movement mechanism, which is based on servo motors connected to the four legs, as well as designing the external frame with the electronic board as well. In other words, all the parts of the robot I will work on.
    My design based on fitting all parts together without any glue or screws, so there are no extra costs.

    What materials and components will be used?

    For the frame I will use:

  • PLA for 3D Printing parts.
  • Black Acrylic 5mm for the top frame.
  • For the electronics parts:

  • 12 >> Mini Servo Motor SG90 9g.
  • 1 >> Bluetooth Module HC-05.
  • 1 >> SMD Atmega 328P.
  • 1 >> Male Headers.
  • 1 >> Screw Terminals 2.5 mm.
  • 2 >> Blue LEDs 5 mm.
  • 1 >> LIPO Battery 11.1V 2200MAH
  • 1 >> Buck Converter 5A / DC-DC.
  • 1 >> ON-OFF Power Switch-Black 2 pin.
  • A&I_1

    Where will they come from?

    The PLA & Acrylic from the Lab, the electronics components from a local supplier.

    How much will they cost?

    Image Item Quantity Cost JD Total Cost JD Supplier
    A&I_1 Mini Servo Motor SG90 9g 12 2.5 30 Mikroelectron
    A&I_1 Bluetooth Module HC-05 1 8 8 Mikroelectron
    A&I_1 SMD Atmega 328P 1 8 8 Mikroelectron
    A&I_1 Male Headers 1 0.25 0.25 Mikroelectron
    A&I_1 Screw Terminals 2.5 mm 1 0.35 0.35 Mikroelectron
    A&I_1 Blue LEDs 5 mm 2 0.1 0.2 Mikroelectron
    A&I_1 LIPO Battery 11.1V 2200MAH 1 35 35 Mikroelectron
    A&I_1 Buck Converter 5A / DC-DC 1 6 6 Mikroelectron
    A&I_1 ON-OFF Power Switch-Black 2 pin 1 1 1 Mikroelectron

    What parts and systems will be made?

    I will design the robot base with the 4 legs (each one contain 3 servo motors), with the main PCB board of Atmega328P, and the Mobile app.

    What processes will be used?

    What questions need to be answered?

    How will it be evaluated?

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