27908 Parallax Inc, 27908 Datasheet

Interface Modules & Development Tools Trackball Module

27908

Manufacturer Part Number

27908

Description

Interface Modules & Development Tools Trackball Module

Manufacturer

Parallax Inc

Series

-r

Datasheet

1.27908.pdf (3 pages)

Specifications of 27908

Operating Supply Voltage

5 V

Product

Interface Modules

Accessory Type

Trackball

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With/related Products

Game Systems, Development, Hobby and Education Projects

Current page: 1 of 3
Download datasheet (129Kb)

Trackball Module (#27908)

Add a fun human interface component to your Propeller microcontroller projects with the Trackball

Module from Parallax! Similar to the trackball found on many smart phones, this sensor is easily portable

and can be used to replace a mouse in many applications. The Trackball Module comes with a built-in

center select switch and a red LED, which can be programmed to light up the trackball when desired.

Features

Key Specifications

Application Ideas

Device Information

Theory of Operation

The Trackball Module has four tiny rotatable magnets attached to each corner of the component.

Rotating the Trackball Module in the up, down, left, or right directions will result in the rotation of one

magnet, while any diagonal movement will result in the rotation of two magnets.

Whenever any of the magnets rotate, a tiny magnetic field is created, which can be detected by a Hall

Effect sensor paired with each magnet. The Hall Effect sensor will then output a series of high/low signals

which can be monitored by the Propeller microcontroller to determine the direction of movement of the

trackball. The speed of rotation is then proportional to the period of the pulse, where slow rotation will

result in a longer period and faster rotation will result in a shorter period.

Note: The Trackball Module does require a small break-in period before the ball will rotate smoothly.

Built-in center select switch and red LED

Detects movement in the up, down, left, right, and

diagonal directions

8-pin DIP module is ready for breadboard or

through-hole projects

Built-in 1 kΩ series resistors for compatibility with

the Propeller microcontroller and other 3.3 V devices

Power requirements: 5 VDC

Communication: Four-pin variable-frequency binary

signaling output (for trackball)

Operating temperature: 32 to 158 °F (0 to +70 °C)

Dimensions: 1.0 x 1.0 x 0.67 in

(25.4 x 25.4 x 17.08 mm)

Mouse replacement

Video game input

Trackball Module (#27908)

Web Site: www.parallax.com

Forums: forums.parallax.com

Sales: sales@parallax.com

Technical: support@parallax.com

Office: (916) 624-8333

Fax: (916) 624-8003

Sales: (888) 512-1024

Tech Support: (888) 997-8267

v1.0 4/8/2010 Page 1 of 3

Related parts for 27908

27908 Summary of contents

Page 1

... Note: The Trackball Module does require a small break-in period before the ball will rotate smoothly. Copyright © Parallax Inc. Web Site: www.parallax.com Forums: forums.parallax.com Sales: sales@parallax.com Technical: support@parallax.com Trackball Module (#27908) Office: (916) 624-8333 Fax: (916) 624-8003 Sales: (888) 512-1024 Tech Support: (888) 997-8267 v1.0 4/8/2010 Page ...

Page 2

... For use with the example program included on the Trackball Module product page. Copyright © Parallax Inc. Function 5V Supply Voltage Output of Hall Effect Center select switch, active-high Output of Hall Effect IC - Left Ground -> 0V Output of Hall Effect IC - Down LED control pin Output of Hall Effect IC - Right Trackball Module (#27908) v1.0 4/8/2010 Page ...

Page 3

... Trackball Module. The Parallax Serial Terminal itself is installed with the Propeller Tool v1.2.7 which is available from the Downloads link at www.parallax.com/Propeller. The download for this demo code is available on the Trackball Module’s product page. Browse to www.parallax.com and search for 27908. Copyright © Parallax Inc. Trackball Module (#27908) v1.0 4/8/2010 Page ...

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