Nxt Compass Sensor Tutorial

A brief introduction tutorial part 2 duration.

Nxt compass sensor tutorial.

At brickfest there was a wonderful demo of the compass sensors. The compass sensor is housed in a standard mindstorms sensor housing to match the other mindstorms elements. The current heading is calculated to the nearest 1 and refreshed 100 times per second. Some of these movies have exercises directly under them.

However rather than just providing schematics and sample code for the bs2 i ll be providing some theory on how the sensors work as well. Using hitech compass sensor. Using nxt components with a micro controller. The essentials are things every nxt programmer should know.

The current heading is calculated to the nearest 1 and refreshed 100 times per second. The compass sensor connects to an nxt sensor port using a standard nxt wire and uses the digital i2c communications protocol. It needs a hitechnic or mindsensors compass sensor plugged in to one of the sensor ports. I think this is a limit of the nxt g interface not the sensor itself.

It s important to do these exercises not just assume you get it the advanced section is for reference purposes. This is a guide to using the motors and sensors from the lego nxt set with a parallax basic stamp ii or bs2. But if you are using a port splitter or a remote nxt or rcx it may be of interest. To use the compass sensor from nxt g an additional piece of software needs to have been added to your computer.

The nxt compass sensor contains a digital magnetic compass that measures the earth s magnetic field and calculates a heading angle. It implements the same methods but uses a compass sensor to ensure that the pilot does not deviate from the correct angle of robot heading. The compasspilot is an extension of the differentialpilot class. Using the hitechnic compass sensor with nxt g.

Since the us sensor block returns only a single byte the sensor returns the heading angle divided by two currently. In the picture to the left you can see the compass sensor is mounted high well above both the motors and computer brick. Program using labview lego. This tutorial for lego mindstorms nxt is divided in two sections.

Programming the nxt compass sensor to point in the right direction. If you are using a sensor connected directly to a nxt sensor port you can use the sensorport class and you can probably skip this section. Put a compass equiped ro bot on a turntable and spin the turntable.