Lesson Notes By Weeks and Term v4 - SHS 1
Tools & Apps for Robot Design
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Tools & Apps for Robot Design
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Subject: Robotics
Class: SHS 1
Term: 2nd Term
Week: 5
Grade code: 1.2.2.LI.2
Strand code: 2
Sub-strand code: 2
Content standard code: 1.2.2.CS.1
Indicator code: 1.2.2.LI.2
Theme: Robot Design Methodologies
Subtheme: Tools & Apps for Robot Design
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Welcome, future engineers and innovators! Today, we are going to learn how to build robots without touching a single physical screw or wire. How is this possible? We will explore the exciting world of virtual robot design. In Ghana, building a physical robot can be expensive. Imagine you are designing a robot to help plant seeds on a cocoa farm or a robot to help sort waste in Accra. If you build it physically and it doesn't work, you have wasted money on parts and a lot of time. Virtual design tools allow us to build, program, and test our robot on a computer first. We can fix all the mistakes for free before we build the real thing.
This topic is about the software we use to bring our robot ideas to life on a computer. Think of it like an architect designing a house on a computer before the builders start laying blocks. A. Why Design Robots Virtually?
Before we dive into the tools, let's understand *why* we do this. Cost-Effective: It is free to make mistakes on a computer. If you place a motor in the wrong place virtually, you just drag it to the correct spot. In the real world, this could damage the motor or the robot's frame, costing money to replace. Safety: You can test dangerous robot behaviours (like high-speed movements or heavy lifting) in a simulation without any risk of hurting someone or breaking things. Speed & Iteration: You can build and test 10 different versions of a robot's leg in a simulation in the same time it would take to build one physical version. This process of improving a design is called iteration. Accessibility: Not everyone has access to a full robotics kit at home. With free software, anyone with a computer can start learning and designing. B. The Three Key Types of Tools
There are three main categories of software you will use. Often, one software program can do more than one of these things. Virtual Platforms / CAD (Computer-Aided Design) Software What it is: This is your digital workshop or your box of virtual building blocks. CAD software allows you to create a 3D model of your robot, piece by piece. You can select virtual components like wheels, motors, sensors, and chassis (the robot's frame) and assemble them on the screen. How it works: You typically drag and drop parts, connect them, and set their positions precisely. It’s like playing with LEGOs, but on a computer and with much more detail. Examples of Tools: Tinkercad: A free, web-based tool from Autodesk. It's very easy for beginners. LEGO Digital Designer (LDD) or Studio 2.0: Perfect if you are familiar with LEGO Mindstorms or EV3 kits. You can build with virtual LEGO parts. Onshape / Fusion 360: More advanced, professional tools used in engineering. Ghanaian Context Example: Imagine designing a robot to navigate the crowded aisles of Makola Market. In a CAD program, you would first design a small, stable base with three or four wheels to ensure it doesn't tip over easily. You would then add a basket on top to carry goods. The CAD model helps you see if the basket is too big or if the wheels are positioned correctly for stability.
*A simple 3D model showing wheels, a chassis, and a caster wheel.* Simulation Tools What it is: A simulator is a virtual world that understands physics (like gravity, friction) and electronics. After you design your robot in CAD, you bring it into the simulator to see how it would behave in real life. How it works: The simulator runs a computer program that calculates how your robot's parts will move and interact. When you tell a virtual wheel to spin, the simulator makes it spin and pushes the robot forward, taking into account the floor's friction and the robot's weight. Examples of Tools: Tinkercad Circuits: This part of Tinkercad not only lets you design circuits but also simulates how they work with code (e.g., making an LED blink). CoppeliaSim (formerly V-REP): A powerful and popular robotics simulator used in universities. Gazebo: A professional simulator often used with the Robot Operating System (ROS). Ghanaian Context Example: You have designed your Makola Market robot. Now, in the simulator, you create a virtual environment that looks like a market aisle with obstacles. You run the simulation to test: Mechanics: Do the wheels turn correctly? Does the robot move forward when the motors are on? Stability: If it bumps into a small virtual obstacle, does it tip over? Functionality: If it has an arm, can it actually reach and pick up a virtual object? Programming IDEs (Integrated Development Environments) What it is: An IDE is a special software application where you write, manage, and upload code to your robot's "brain" (the microcontroller, like an Arduino). How it works: It's like a word processor for code. It has features like colour-coding for keywords, error checking to find mistakes in your code, and a button to send the code to the robot. For this lesson, we focus on using the IDE to load *already written* code to test our design. Examples of Tools: Arduino IDE: The most common IDE for programming Arduino-based robots. Microsoft MakeCode: Features a drag-and-drop block interface, making it very beginner-friendly. Thonny or Mu: Simple Python IDEs used with microcontrollers like the Raspberry Pi Pico. C. The Virtual Design Workflow