07-11-2012, 02:06 PM
ACCELEROMETER BASED MOUSE
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INTRODUCTION
Accelerometer based mouse is a mouse which commands the mouse cursor by tilting the palm, so you do not need to rest your hand on any kind of hard surface.
It consists of a single 3-axis accelerometer: two for position, and one axis for scrolling.
The mouse communicates to a computer via the PS/2 protocol, or an optional PS/2 to USB converter can be purchased and the mouse can be connected through a USB port.
This is an OS independent mouse.
The Air mouse is comfortable to wear, and does not significantly inhibit typing. It functions completely as a two button serial mouse, and even implements variable rate vertical scrolling.
Why an Accelerometer based Mouse?
There have been only two major changes to the mouse since its inception: more buttons, and interface changes (PS/2, USB, Wireless) but the core interaction method has not changed.
An accelerometer based mouse system is a great option since:
It's cool
Provides health benefits
What is an Accelerometer?
An accelerometer is a sensing element that measures acceleration.
It is a vector that has magnitude and direction.
Accelerometers measure in units of g .
Accelerometers can measure: vibrations, shocks, tilt, impacts and motion of an object.
PS/2 Protocol
Bidirectional serial protocol.
Transmit movement and button-state data to the computer's auxiliary device controller (part of the keyboard controller).
The controller, in turn, may send a number of commands to the mouse to set the report rate, resolution, reset the mouse, disable the mouse, etc.
The host provides the mouse with a 5V ~100 mA power supply.
Why PS/2? The Trade-offs:
There are obviously many options for mouse communications protocols, such as serial, PS/2, and USB. There are multiple reasons for choosing PS/2.
We could draw power from the PS/2 port, giving our mouse the ability to stand alone without a dedicated power supply or battery.
PS/2 can be easily adapted to fit USB using a simple adapter. This way we can still get the usability of USB without having to learn the complicated USB standard.
CONCLUSION
An accelerometer based mouse commands the mouse cursor by tilting the palm, so you do not need to rest your hand on any kind of hard surface.
The entire system is a simple mechanism and works exactly as a normal mouse currently.
The mouse helps to carry simple instructions and when we work for executing certain commands, the mouse comes into working action.
The ABM would execute the same instructions as done by the current mouse but the major difference is that it would be simpler and would only require the hand gestures of user to execute instructions.