LAPTOP TIPS by Venkatraman

LAPTOP TIPS

• Never keep laptop on softmaterials like bed or on any clothes. The reason is that processor fan will not get ventilation which results in processor failure as well as battery life will be reduced.

All ways keep laptop on hard surface..!

• Never put your laptop into the bags without turn it off completely(standby is also not allowed).
• Do not bend the laptop power cable and also always keep the battery charger in ventilated place whicle charging.

These suggestions may be rediculous but very important for long life of your system.

=====>For circuit enthusiasts only.

Automatic Laptop Power dis-connector.

It is really good practice to disconnect the laptop power cable after the use. However many times we (I) forget to do so. Here is a simple circuit which automatically connect or disconnect the laptop to main AC plug.

The automatic circuit shown in the below image needs hardly few electronic components. Please make sure that proper teminals are connected from USB cable to relay coil. Any wrong connection can destroy the laptop USB PORT.

The details of connection is shown in above image. I am using this circuit from last 6-months. If you are interested do this one and if you need any assistance please contact any time.

Regards,
Venkatraman.

venkatramanhm@gmail.com

Ubuntu...! One of the best OS...!

The Ubuntu is one of the most competitive OS(operating system) for Windows. I love Ubuntu because of its simplicity. It comes with thousands of application and that too absolutely free!!. No virus problems...! No drivers needed..! No payments of any thing.Install in half an hour and enjoy 365+365+...... days...!

For engineers, OS like Ubuntu is really great gift. Any thing can be automated,anything can be added any instant of time. For example the circuit simulator like LTSPICE work nicely under wine. Ngspice and other circuit simulator also available. The scilab and octave are equivalent to matlab. There are many things to explore. There are thousands of application.

If you have interest, please go to application---> Ubuntu software center and search for all kind of application.


I heartily congratulate the ubuntu community for such OS.

Universal Logic : Mux to Logic gates conversion

1. Designing an Inverter using 2:1 MUX.

2. Designing an AND Gate using 2:1 MUX.

3. Designing an OR Gate using 2:1 MUX.

4. Designing an XOR Gate using 2:1 MUX.

5. Designing an XNOR Gate using 2:1 MUX.

Why the lines of force in an electric field start at the +ve charge and terminate at the -ve charge?

Find the answer at :




http://www.physlink.com/Education/AskExperts/ae245.cfm

LVCMOS

LVCMOS

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Low Voltage Complementary Metal Oxide Semiconductor (LVCMOS)

 is a low voltage class of CMOS technology integrated circuits.To obtain better performance and lower costs, semiconductor manufacturers reduce the device geometries of integrated circuits.With each reduction the associated operating voltage must also be reduced in order to maintain the same basic operational characteristics of the transistors. As semiconductor technology has progressed,LVCMOS power supply voltage and interface standards for decreasing voltages have been defined by the Joint Electron Devices Engineering Council JEDEC for 3.3, 3.0, 2.5, 1.5, 1.2 and 1.0 volts.