9V Backup Battery Holder

October 29, 2017 by SuperRenegade | Coach's Corner, Competing, Electrical

New coaches: don't be caught flat-footed at your first tournament. Understand what the required 9V backup battery is all about, *well in advance* of your competition (in time for you to find/buy one).

Archive Thumb

October 23, 2017 by SuperRenegade | Coach's Corner, Electrical, Mechanical

The VEX yaw rate gyro sensor has exceedingly little official documentation or instructions. I have tried to collect all of the general information I can find from the VEX Forum along with my personal experience and put it here in one place. [This post does not include specific programming instruction.]

Archive Thumb

October 19, 2017 by SuperRenegade | Coach's Corner, Programming

Jumper clips and LEDs are both plugged into digital ports on the cortex and can be used for autonomous code selection, debugging, or an alert system.

VEX Line trackers

October 16, 2017 by SuperRenegade | Coach's Corner, Electrical, Programming

The VEX line tracker is used to follow the white tape lines on a competition field during autonomous. This post covers it all: how they work, how to install them on your robot, testing, programming (including easyC), resources, and troubleshooting.

Archive Thumb

October 15, 2017 by SuperRenegade | Coach's Corner, Programming

Special thanks to Griffin Tabor who provided this code for how to calibrate your line trackers when you put your robot on the field (before the match starts) to account for ambient lighting conditions.

Ultrasonic sensors on several robots

October 11, 2017 by SuperRenegade | Coach's Corner, Electrical, Programming

The ultrasonic sensor uses sound waves to calculate the distance to an object in front of the sensor. Use it in autonomous, driver control, & pre-auton/initialize too!

Archive Thumb

October 6, 2017 by SuperRenegade | Coach's Corner, Electrical, Programming

Shaft encoders are another of VEX's most reliable—and widely used—sensors. Encoders are used (primarily in autonomous) to measure how far a robot has travelled, and to keep the robot moving in a straight line.

Archive Thumb

September 27, 2017 by SuperRenegade | Coach's Corner, Electrical, Programming

This is the second of a series of posts that examines each VEX sensor in turn. The aim of this series is to help teams that are new to using sensors have an idea of what is available and what they might like to use on their own robots. And since this post has gotten […]

Bump and Limit Switches on robot

September 26, 2017 by SuperRenegade | Coach's Corner, Electrical, Mechanical, Programming

Bumper & limit switches are reliable and widely used digital sensors. Here's how they work and how you can use them on your robot.

All VEX sensors

September 26, 2017 by SuperRenegade | Coach's Corner, Competing, Electrical, Programming

VEX has a large number of sensors, and the wide array can be mystifying for novice teams. This series will explain each sensor in turn, and hopefully help coaches with purchasing decisions.

VEX Programming Hardware Kit

September 22, 2017 by SuperRenegade | Coach's Corner, Programming

There’s a lot of things I like about RobotC so far, and perhaps the most time-saving item is wireless downloading. In order to make use of this feature, you need to purchase the VEX wireless downloading cable, officially known as the “Programming Hardware Kit.” Cost: $50; I got mine on eBay for about half that […]

Archive Thumb

September 13, 2017 by SuperRenegade | Coach's Corner, Programming

The Smart Motor Library does nifty things for RobotC programmers to help prevent motor overload (motor stall). This post is a break-down of all of its functionality, plus a how-to guide on including it in your competition programming.

VEX In The Zone field setup

August 18, 2017 by SuperRenegade | Coach's Corner, Competing, Running Your Team

New coaches may not realize that the game manual downloaded in April has been changed (twice). Here's a summary of both the June 15 & August 17 In The Zone game manual updates. Make sure your students understand the most recent rule changes to avoid any unwelcome surprises!

VEX Inspection PTC Authenticator

August 12, 2017 by SuperRenegade | Coach's Corner, Competing

VEX Worlds and certain local tournaments include a "PTC test" on robot motors to ensure they have not been illegally modified. Here's the details.

RobotEvents screen shot

August 10, 2017 by SuperRenegade | Coach's Corner, Competing, Running Your Team

Attention new mentors – this one's for you! Here you will find an agenda-organized description of all the things that happen at a tournament, and what you as a mentor need to be aware of.