How to protect USB Pendrives/Flashdrives from VIRUS ?

Lets Protect USB Pendrives / flash drives from Viruses.

Most often our system get infected with virus soon after a USB pendrive has been plugged in. These days it is so easy to get infected by viruses by plugging in a pendrive to your system from unknown source (may be your friends one or your college desktops).

Not all the security programs can defend your pc against the virus attacks carried out through pendrives. But if we can take necessary steps, then we can be safe from such viruses, worms and spywares spreading through pendrives/ flash drives.

So here are some software’s that can efficiently protect your system and pendrive from unknown threats ad viruses.
1.USB Write Protector

It is a software that can help you in write protecting your Pendrive. USB Write Protector allows only to read the data from the pendrive but it wont permit to write data into the pendrive. This is really useful if you take your pendrive to plug on to your friends or relatives pc, as most of the virus enter the pendrive unknowingly. USB Write Protector is a small program, around 190kb in size.

ETY

                     


USB Write Protector

The program doesn’t need any installation and can be directly run from the location. On running the program the window just shows up with just two option to enable write Protection in your Pendrive/ USB Flash Drive and to Turn Off the USB Write Protection. Its that simple. You just need to pick the option and click on OK.
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1 Watt Four Stage FM Transmitter

This FM transmitter circuit uses four radio frequency stages: a VHF oscillator built around transistor BF494 (T1), a preamplifier built around transistor BF200 (T2), a driver built around transistor 2N2219 (T3) and a power amplifier built around transistor 2N3866 (T4). A condenser microphone is connected at the input of the oscillator.

Working of the 1 Watt transmitter circuit is simple. When you speak near the microphone, frequency-modulated signals are obtained at the collector of oscillator transistor T1.

The FM signals are amplified by the VHF preamplifier and the pre-driver stage. You can also use transistor 2N5109 in place of 2N2219. The preamplifier is a tuned class-A RF amplifier and the driver is a class-C amplifier. Signals are finally fed to the class-C RF power amplifier, which delivers RF power to a 50-ohm horizontal dipole or ground plane antenna.

Use a heat-sink with transistor 2N3866 for heat dissipation (Note: or 2N4427 because it works better at 12 V and delivers up to 1 watt RF power). Carefully adjust trimmer VC1 connected across L1 to generate frequency within 88-108 MHz. Also adjust trimmers VC2 through VC7 to get maximum output at maximum range.

Regulator IC 78C09 provides stable 9V supply to the oscillator, so variation in the supply voltage will not affect the frequency generated. You can also use a 12V battery to power the circuit. Assemble the circuit on a general purpose PCB. Install the antenna properly for maximum range.

Coils L1 through L5 are made with 20 SWG copper-enameled wire wound over air-cores having 8mm diameter. They have 4, 6, 6, 5 and 7 turns of wire, respectively.