Explain the trackball and thumbwheel devices, Computer Engineering

Assignment Help:

Explain the Trackball and Thumbwheel devices

 Joysticks

A joystick consists of a small, vertical lever (called the stick) mounted on a base that is used to steer the screen cursor around. Some joysticks are mounted on a keyboard. Most joysticks select screen positions with actual stick movement; while a few respond to the pressure on the stick. Figure 1.10 shows a movable joystick.

 The distance moved by the stick in any direction from its center position and the distance of the screen cursor movement in that direction are proportionate. Potentiometers mounted at the base of the joystick are used to measure the amount of movement, and the stick returns to the centre position when it is released due to the spring. One or more buttons can be programmed to act as input switches to signal certain actions once a screen position has been selected.

 


Related Discussions:- Explain the trackball and thumbwheel devices

Why eprom chips are mounted in packages, Why EPROM chips are mounted in pac...

Why EPROM chips are mounted in packages that have transparent window? Since the erasure needs dissipating the charges trapped in the transistors of memory cells. This can be co

With respect to security which is the better .net or j2ee, With respect to...

With respect to security, which one is the better choice?.Net or J2EE? Explain? As per majority programmers .NET is the best one which have one vendor compare to, the ease of

Show the transmission control protocol, Q. Show the Transmission Control Pr...

Q. Show the Transmission Control Protocol? Transmission Control Protocol (TCP) TCP makes Internet reliable. TCP solves many problems which can occur in a packet switching

Which electro mechanical switch had fewer moving parts, The             el...

The             electro mechanical switch (developed in 1938) had fewer moving parts than earlier switches. (A)  No. 1ESS                                 (B)  Strowger (

What is oo development, What is OO Development? OO development is a way...

What is OO Development? OO development is a way of thinking about software based on abstractions that exist in the actual world. Development refers to software lifecycle, desig

Define class p, Define class P  The class of all sets L that can be kno...

Define class P  The class of all sets L that can be known in polynomial time by deterministic TM. The class of all decision problems that can be decided in polynomial time.

Dma controllers - computer architecture, DMA controllers in computer system...

DMA controllers in computer system:   DMA Controller   Part of the I/O device interface   DMA Channels   Performs functions that in general would be performed by t

What is the use of boot block, What is the use of boot block? For a com...

What is the use of boot block? For a computer to start running when powered up or rebooted it needs to have an initial program to run. This bootstrap program tends to be simple

File structures, Write in brief about UNIX process structure.

Write in brief about UNIX process structure.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd