How Wired and Wirless Mouse Works ?

Optical Mouse Cartoon

In this Post, I am Actually gonna describe that how wireless Mouse Work. Before you must Understand the working of optical mouse. Because the basic operation of both the mouse are actually same apart from that the wireless mouse works with some extra operation like transmitting signal at microwave frequency and at the receiving end it Decodes the signal for execution it through CPU

Optical Mouse with RED LED

How Optical Mice Works ?
Actually, Optical mice consist of many operational Blocks Like DSP (Digital Signal Processor), CMOS & LED (red). the optical mouse actually uses a tiny camera to take 1,500 pictures every second. Able to work on almost any surface, the mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a complementary metal-oxide semiconductor (CMOS) sensor.

The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.

This was all about the working of optical mouse, Now Lets Talk about Wireless or Cordless mouse, The Whole Construction is same as that of Optical mouse just except that wireless mouse use microwave frequency medium to transmit the signal from DSP instead through wire.

How Wireless Mouse Works ?
It is necessary for a wireless mouse to have a transmitter inside it and a receiver installed on the system to which it is (to be) connected. Line of  Sight communication is not needed in this case, as required in infrared communication. The receiver and the sender works on the radio frequency usually the microwave frequency i-e 2.4 GHz. At such a high frequency, the chances of interference is almost negligible. These frequencies also provide a range of almost 150 ft which is sufficient for a hand-held mouse. What happens is, that the RF signals sent from the transmitter are received at the receiver and the decoded and given to the processor to execute the task.

Wireless Mouse From Microsoft

Lets talk about the advantages of the wireless mouse, it has over the others.
  1. It provides you a user friendly environment - no wires - no headache.
  2. They are not powered by your system supply, they have  their inbuilt rechargeable or disposable batteries.
  3. The wireless mouse do not require Line of Sight communication and thus provide you a feasible environment
  4. They are inexpensive and and you can buy one for less than US$ 25.


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