What is Multiplexer and How it works
By Unknown 12:41 AM breakingnews , Electronics Tricks , feature , Latest Updates
It helps different sources of data to use a single medium for transmitting their data.Basically the aim is to share an expensive resource
In more simple words, Multiplexer also called as Mux is a device that selects one of several analog or digital input signals and forwards the selected input into a single line.A multiplexer of 2^n inputs has n select lines, which are used to select which input line to send to the output.
A device that performs the reverse process is called a Demultiplexer (DEMUX).
Follow this tutorial for more understanding of Multiplexer
http://www.wisc-online.com/Objects/ViewObject.aspx?ID=DIG5604
The Operation of a Multiplexer/Demultiplexer Circuit
http://www.wisc-online.com/Objects/ViewObject.aspx?ID=DIG5804
How does Wireless Mouse works ?
By Unknown 5:26 AM breakingnews , Electronics Tricks , feature , Interesting Facts
It is necessary for a wireless mouse to have a transmitter inside it and a receiver installed on the sytem 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.The wireless technology in mouse are mostly accomplished on the optical mouse and not on the old mechanical ball mouse of early 1970's.
Do you have any idea about 802.11b or 802.11g ? These are also related to the wireless technology and the protocols that I will discuss later.
Lets talk about the advantages of the wireless mouse, it has over the others.First of all, it provides you a user friendly environment - no wires - no headache. Secondly they are not powered by your system supply, they have their inbuilt rechargeable or disposable batteries. Thirdly the wireless mouse do not require Line of Sight communication and thus provide you a feasible environment Lastly they are inexpensive and and you can buy one for less than US$ 25.
and in Pakistani about 14-1500 Rs Both wireless Key Board and Mouse
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