Robotics Education & Competition Foundation
Online Challenges

REC Foundation STEM Educational Video Challenge

Create a video to teach a new team something about the STEM aspects of robotics engineering or construction that you have learned from experience that can help them better prepare for a competition.



Vex online challenge Stem Video by 918 E


This video is an entry to the REC Foundation STEM Educational Video Challenge made by Team 918E. The purpose of the video is to show the importance of design in the process of building a wining robot.
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AGMA Stress Analysis

3946A Sun Devils

This video is 3946A's entry to the STEM Educational Video Online Challenge. It is a walkthrough of the math used in AGMA analysis, used to calculate the stress gears experience .
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6 bar and holonomic drive


This video shows the basic concept of the 6 bar and what a holonomic drive is. In addition we show off these 2 concepts in use. This shows the reason behind our use of our wheel setup how it causes the robot to move.
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VEX Robotics: How to Calculate Robot Drive Speed


Benton Middle School, Team 1231E (Erasers). 2014-2015. Speakers: Victoria A. & Riyanka R. Camera Women: Jillian M. VEX Robotics: How to Calculate Robot Drive Speed STEM Educational Video
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GitHub Tutorial


A short video detailing the basics of working with GitHub. This is mostly helpful to programmers looking for a way to effectively store code with lots of additional features for collaboration.
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How's My Driving

Wingus or Dingus

VRC 7682 Wingus & Dingus - How's My Driving? 2015 RECF Educational Video Challenge submission. Targeted at new teams this year we're introducing some basic joystick to robot/motor control options and having a little fun along the way. Choosing an appropriate joystick mapping is really important and often dependant on what style of robot you're building but there are some variations and extra features we'll show you.
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Calculating Inefficiency


In order to further perfect and make efficient our bot's design, our team used calculus to calculate the inefficiencies where the wheels weren't contributing or were actively subtracting from our overall turn capabilities. In this video, we explain how we went through this applicable process.
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183Z educational video 2015


VEX Online Challenge Educational Video for team 183Z for the 2014-2015 VEX season
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Lifts for VEX IQ


This video analyzes and compares different lift mechanisms that can be used for VEX IQ Robotics This version supersedes the one that was posted earlier. Something was missing from the credits in the last version.
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maintenance on my wheel?


VEX VRC ID TGZ5 Team tgz5- maintenance on my wheel? 2015 RECF Educational Video Challenge submission. Intended for new teams this year we are introducing maintenance for the wheels, to protect motors in driver mode, improve the accuracy of autonomous mode. Hopefully this video helps to have a better performance in the field and extend the lifetime of your wheel.
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How to make different types of lifts


In this video, we have shown how to build the different types of lifts that are commonly used in VEX Robots. This video will be especially helpful to new and growing VEX teams.
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The Tipping Point


This video is about why robots tip and how to fix those problems.
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REC Educational Video


This video strives to show what VEX is about while adding the factor that girls can do it too. VEX and many programs are trying to get females more involved and that's something John Hardin wants to help with.
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VEX Joints


An overview of the types of joints commonly used in VEX Robotics.
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Lifting Cubes on one battery


Using mathematical calculations it is possible to figure out how many times you can lift cube(s) to certain heights and how many times. However, this does not take in account for other system within the robot. We are able to incorporate the science and mathematical part of STEM within robotics.
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Calculate Gearing Ratio


How to calculate what gear ratio is needed in a robot's lift arm based on what weight it has to lift.
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Melody Delostrico

The young members of 2460P demonstrate an unpowered chain reaction they learned from the VEX IQ Curriculum.
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Building a Vexnet Competition Switch


This video explores the parts required as well as aspects of the assembly for a vexnet competition switch. The video assumes that you can strip wire as well as manipulate them into the ports of an Ethernet jack.
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STEM Educational Video Challenge Team 8066A


We're Team 8066A, Atom, from Singapore.In this video, We show you how to build a good and stable scissors lift using c-channels, linear slides, rubber nuts, housings and screws.
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Factors of a Robot's Speed


The following video describes the factors of a robot's speed and discusses the importance of gear ratios and motors.
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How to Avoid Jerk(s)


Jerking your motors back and forth at full power can cause them to trip during competition and possibly wear out over time. Additionally, if your robot is tall when extended, such sudden movements can tip over the robot if you're not careful. In this video, we outline a simple but effective way of changing your code so that your motors change speeds a bit more gradually.
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The Math Behind Joystick Programming


With so many template files and code snippets floating around on the internet, it's not too hard to find yourself using code that you don't really understand. This often happens with joystick control code. In this video, we explain what underlies the code that maps joystick positions to wheel movements in two different kinds of drive systems - a simple single joystick control system, and a holonomic/mecanum drive. By doing so, we hope to impart a general understanding of the concepts behind this element of programming that you can extend to more complicated kinds of drive systems.
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Using PID Controllers


It can be hard to move your lift to a certain position and stabilize it there, or drive to a particular location and stop exactly where you want to, or to make sure one motor is rotating exactly as fast as another. All these problems require some sort of control mechanism to solve, and PID controllers are perhaps the most versatile and powerful type out there. In this video, we walk through the basics of setting up a PID controller, using lift position control as our example. The math behind it can seem scary, but once you grasp it, you'll have the ability to make your robot more elegant...
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The No Sweat Approach to Troubleshooting


Oftentimes, when there's a problem with your robot, you can figure things out with a little trial and error. Other times, however, you're stuck staring at your robot, bashing your head against a wall, and wondering what's going wrong. This video is for those times. We offer a flexible, systematic approach that will help you pinpoint exactly where the issue you're having is coming from.
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Dynamic Pull Test with 3.25 Traction Wheels


Two SquareBOTs and hitched together with 1-bar and tested with different wheels against the new 3.25 Traction wheels.
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The Officialish Guide To An Awesometacular Vex...


When considering topics for this competition, we realized that a solid engineering design notebook is one of the least understood major topics of engineering. This video is a guide to creating a well formatted engineering design notebook.
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Universidad Tecnológica de Gutiérrez Zamora,...


El presente video nos muestra la aplicación de los kits de vex para tener un motor con mayor torque, o con mayor velocidad. Integrantes: Alejandro Uriel Castillo Russi Eduardo Hernández Portilla Francisco Javier Cruz Cortes Julio cesar Centeno García Luis Emanuel Cruz Vasquez Rosendo Ronquillo Romero Hugo Israel López Matiano Bryan
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7843C Linear Lifts (revised)


An explanation of linear lifts by team 7843C, a middle school VEX Robotics team from the 4-H Time for Technology Club
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Team 750C VEX Educational Video 2014 - 2015

750C (4Chainz)

We explain how the asterisk drive that we are currently using in competition functions.
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