Tag: sensor (page 1 of 2)

VEX Sensors: Accelerometer

The VEX accelerometer component’s usefulness in competition seems to be limited to a tilt sensor or an unexpected-stop sensor. Using it for position calculation involves double-integration, which introduces noise.

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VEX Sensors: Light Sensor

The VEX light sensor does not see a lot of use in competitive robotics. This analog sensor returns a numerical value that corresponds to the amount of ambient light detected.

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The Kill Timer

If you’re new to using sensors in your autonomous code, you’ll want to read this. A kill timer can break your robot out of a while loop if it’s been running past a reasonable length of time, preventing gear-grinding, stalling, and the like.

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VEX Sensors: Getting Started with the Gyro

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.]

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VEX Sensors: Jumper Clips & LED Indicators

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.

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VEX Sensors: Line Tracker

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.

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Line Tracker: On-the-Field
Calibration Code

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.

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VEX Sensors: Ultrasonic Range Finder

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!

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VEX Sensors: Shaft Encoders

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.

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VEX Sensors: Potentiometer

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 […]

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