Robot Engineering: Tapping the Artist within the Bot
When it comes to customizing robots, the spirit of innovation is alive and well in afterschool programs around the country. Extracurricular engineering and robotics clubs may provide a welcome outlet and important mentoring for students. From brainstorming designs to nuts and bolts building to learning how to integrate servo motors and computer programming, robotics projects capitalize on a student's love of tinkering—with the possibility of a clear reward in the end, a bot that does what you want it to do. A new trio of Science Buddies robotics engineering Projects Ideas offer students blueprints for hands-on exploration. Whether it is a student's first robot or merely the next, these projects offer independent challenge for at-home innovation or for a science and engineering design project assignment.Depending on the ages of your children or students, you may find yourself at one of a myriad of points on an important parental continuum—that of encouraging and supporting the engineering spirit. From the time a student can first hold a chunky plastic block and connect it with another block, either flush or staggered, many parents nudge, challenge, and inspire their children to build, connect, modify, and, ultimately, to innovate. In many households, first experiences with building bricks evolve into experiences with increasingly smaller and more varied bricks, and the possibility broadens to encompass remote-controlled toys, circuit and electronics kits, and a host of other mechanical toy and DIY kit options. The parental quest? Nurture, feed, and inspire innovation.
When an elementary school student watches a mechanical bot crawl across the table and notices that if she presses and holds both of the micro-controller buttons at once, the insect will crawl in a circle rather than in straight lines, what happens next? Maybe she experiments with each button separately. Maybe she evaluates the difference in the bot's speed based on how she uses the buttons. Maybe she sees the circular shape of the bot's movement and realizes it could potentially draw a circle.
The insect doesn't really have anything to do with drawing or markers. It's just a tiny bug version of a classic remote-controlled toy car. It is an upgrade over last year's bug, however. That one just had an on and off switch. Once on, it moved without stopping. This model has given her control over the movement. In testing that control, she's made a hypothetical leap. When the student sees the circle and makes a connection to something else that can be done by combining the bug's motions and another implement (a marker), there is magic. Testing her idea by wedging a marker through the bug's appendages and setting it loose on top of a piece of paper may, in fact, generate a circle. If it takes several tries to find the right angle at which to position the marker, or just how far you need to stick it through the bug's legs, that's part of the process. Similarly, pens and markers of different weights may work differently&mddash;or may not work at all. The bug is small and lightweight. That has an impact on what kind of marking instrument the bug can drag along in its circuitous path. But, finally, there is a circle. A circle that a small bug robot has drawn.
In this case, the ability to control the drawing process is limited. But for many parents and teachers, the simple "aha" moment, and the satisfaction of seeing the circle on the page, is an important part of science, technology, engineering, and math (STEM) education. To feed this kind of excitement about engineering, robotics clubs and groups are springing up in an increasing number of schools and after-school programs, often with the support of companies like Motorola Solutions Foundation. Many of these groups work with VEX robotics kits. Part screw-it-together, part brainstorm and modify, part hacker DIY, part programming, and part collaboration with peers and clusters of parents, teachers, and role models, VEX systems can be a fulcrum for middle and high school robotics exploration.
For the Game of It
This year, student robotics teams planning to participate in VEX competitions are preparing for the VEX Sack Attack. To succeed in the Sack Attack challenge, teams will have to design and build a bot that can quickly and efficiently scoop up "sacks" and deposit them in a scoring area to earn more points for the team than the bot on the other side of the 12' x 12' arena within a set amount of time. Different colored sacks earn different points, and there are multiple types of goals, each worth different point values. In preparation for an official bot versus bot Sack Attack showdown, robotics team members often meet in the afternoons and on weekends. Many teams, especially at the middle school level, first assemble a baseline or "kit" sack attack bot. The "kit" bot is functional, but as groups test and observe their bots abilities, they are encouraged to think about ways to enhance the bot's ability to quickly and efficiently perform its task. Following steps of the Engineering Design Process, students collaborate customizing their robot and prototyping and testing new features, behaviors, and programming. What modifications might make the bot easier to maneuver or better able to pick up and deposit sacks? What custom behaviors might give their bot an edge?
Using core VEX components and extrapolating from robotics club investigations, students can independently design and test custom bots built to perform a range of different tasks. An exciting new trio of Science Buddies Project Ideas challenges students to use a VEX kit to create a marker-wielding robot, one that can draw a picture. The tiered suite of projects begins with "Robot Picasso: Building a Robot That Creates Art." In this robotics Project Idea, students are guided in thinking through ways to turn the Vex claw bot into a picture-drawing robot. While basic guidelines for assembly are given, students will need to innovate and troubleshoot their own drawings and designs to construct their drawing bot. At the same time, students will face the limitations of their bot as they test to determine what it can and can't successfully draw—and why.
With the basic "Robot Picasso" drawing bot on hand, a young engineer can tackle more sophisticated challenges to give the bot more refinement and the ability to use more than one color or other tools. The "Motorized Michelangelo: Building an Art Robot with Servo Motors *" Abbreviated Project Idea encourages students to incorporate a servo motor in the robot, allowing greater control. This robot, for example, can be programmed to lift the marker at a certain point rather than drawing a continuous and never-ending line. The "Drawing Dalibot: Designing an Art Robot That Switches Colors *" Abbreviated Project Idea challenges the student to extend the exploration and enable the bot to use more than one color. Controlling how multiple colors are used, selected, and changed offers a fun and sophisticated robotics engineering project that requires the use of servo motors and programming using RobotC.
These three Project Ideas are just the beginning. We encourage students to adapt the core project concepts to further refine the art bot or to create an entirely new kind of robot that builds upon behaviors and functionality from the art bot! Before your students disassemble and start something new, send Science Buddies a picture. We would love to see what your students imagine, innovate, and build!