Category Archives: LEGO Sensors

Preforming the Polygon Shuffle with a EV3 Gyroscope

EV3-G

A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. A polygon is any shape made up of straight lines that can be drawn on a flat surface, like a piece of paper. Such shapes include squares, rectangles, triangles and pentagons, but not circles or any other shape that includes a curve.

There are two main types of polygon – regular and irregular. A regular polygon has equal length sides with equal angles between each side. Any other polygon is an irregular polygon, which by definition has unequal length sides and unequal angles between sides.

geometric-shapes-polygons-sides-worksheet

RobotC: Using Multiple Ultrasonic (Sonar) Sensors

When using Multiple Ultrasonic (Sonar) Sensors together, you need to configure the Sensors to use ‘Single Shot Mode’, so only ONE Sensor is taking a measurement at any time. If you have all the Ultrasonic Sensors on at once they interfere with each other and give incorrect readings. To get around these issues, you need to take advantage of the LEGO Sonar Sensor’s Mode 1: Single Shot Mode.

My NXT Says Numbers Out Aloud!

Update on NXT Sound:

Dexter Industries have taken on my suggestion of using a “Quadravox QV606M1 Sound Module” for an add-on Audio solution for the LEGO Mindstorms NXT kit!
I’ve been working on a project where I was working with lots of numbers as part of controlling the Robot. The routine below is used in conjunction with keyboard shown below. keyboard Inputs are totaled, to give the distance a motor should move.

Mindstorms NXT Soccer Playing Robot

This is the Mark I version of my LEGO Mindstorms Soccer Playing Robot.  The Robot relies on 3x Rotacaster omni-whheels in a Holonomic Platform configuration for movement. The three Rotacasters are driven by 3x NXT Motors connected to the NXT Brick.

Autonomous Rotacaster Omni-Bot

This Autonomous Quad Drive Omni-Bot fitted is with Rotacasters Omni-wheels and uses 4x Ultrasonic Sensors to aid in navigation. It’s based on my previous Quad-Drive Rotacaster Omni-Bot with the addition of the Ultrasonic Sensors. The main challenge is to use all 4 Ultrasonic Sensors without them interfering with each other, resulting in non-valid measurement readings for distance values to objects.



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