Mematikan AutoRun Windows

Mematikan AutoRun Windows berfungsi meminimalisasikan virus yg masuk lewat autorun ^_^

langsung saja ke kotak box run klik Start yg ada di pojok kiri bawah ----> Run lalu ketik regedit lalu ok

trus menuju kesini
HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

klik 2x/double klik pada string NoDriveTypeAutoRun
Isi value data dengan ff yang berarti fungsi Aturun/Autoplay akan di matikan pada 255 drive

lalu ke HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
sama seperti yang diatas ganti value data dengan ff

atau pakai cara ini juga sama saja

tulis gpedit.msc dikotak run

di tab Computer Configuration
administrative templates ----> system --> turn off autoplay

matiin juga di tab User Configuration

restart komputer agar perubahan terasa

W0w

Premature Baby Left In Hole For 24 Hours Survives

Emergency Light

I remember that I used some recycled parts, also a tranformerless power supply. This circuit should be completely covered by a plastic container with the appropiate ventilation. Here is the schematic:

A small sealed maintenance-free battery is perfect, it can provide up to 4 hours of light. If you want someting smaller and easy to install, you can replace the battery and lightbulb with a super bright white led (12,000 mcd at least) and a 1F supercapacitor. Here is the circuit:

When the circuit receives power, it acts like a trickle charger for the lead-acid battery. When the power fails, the relay is off and it sends the battery power to the lightbulb.

I'm not sure if this circuit can work with ni-cad batteries, but I think it may work without modifications. The zener diode must be 13V for the battery-version and 5 volts for the LED version.

Mini Amplifier with LM386

The LM386 is a low voltage audio power amplifier. It can provide 125mW to 750mW, enough for any project that uses audio. This circuit can work with batteries, requieres minimum external parts and works from 4 to 18 Volts (contact the manufacturer or read the technical info. Some versions works only with 5 to 15V.)

The power output depends of the voltage. The power output is 125mW when the voltage is 6V. The voltage gain goes from 20 to 200 and the output is self-centering, so doesn't need dual voltage as other amplifiers. It can be used on battery radios, tape players, intercoms, also, as ultrasonic amplifier. This chip is the "555" of the amplifiers.

Here is the typical application for this chip. Here are two schematics, the first one have a gain of 200 and the second one is only 20. You can use a switch for the 10uF capacitor to have the "boost" option.

The 10k resistor is used to adjust the sensibility if the electret microphone, the 100k resistor is used to adjust the volume.

In theory, this circuit will not work because it needs a pre-amplifier. Supposedly, a 741 or any othe pre-amplifier is needed. As I said before, I don't follow the theory. I already verified that the pre-amplifier is not needed, just adjust the 10k variable resistor. In fact, You may not be able to get the circuit to work properly with a pre-amplifier.

Warning: May be too loud

The 220uF capacitor can be replaced by any other if that value is not available. Do not connect the speaker directly to the output pin. If you are using a tweeter (or piezoelectric) you can connect it directly.

UPDATE: This schematic can be used for almost ANY application that needs an amplifier. The switch labeled "Boost" activates the gain of 200 if the input signal is too weak.