Sambil iseng coba MP 3 di HP, kaga jalan-jalan buka internet ketemu tu software untuk mengubah MP3 jadi WAV, akhirnya enjoy dengerin .........hp.
link nya ada disini, silakan download
Friday, July 27, 2012
Thursday, July 26, 2012
Simple switch-Off Time Delay Circuit
Designing a switch off delay
circuit is quite simple and will cost you no more than $5 to make. All
parts can be picked up from Radio Shack or Fry's if you have them as
well as Parts Express. This will cover the mechanical aspects of it -
theoretical topics can come later. If you suffer from pops on your amps
or any other components, this will help you eliminate it, but it does
not work in all cases.
Simple switch-Off Time Delay Circuit
Designing
a swictch off delay circuit is quite simple and will cost you no more
than $5 to make. All parts can be picked up from Radio Shack or Fry's if
you have them as well as Parts Express. This will cover the mechanical
aspects of it - theoretical topics can come later. If you suffer from
pops on your amps or any other components, this will help you eliminate
it, but it does not work in all cases.
The two circuits di atas illustrate opening a relay contact a short time after the ignition or ligh switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to 12 volts. The circuit on the left is a common collector or emitter follower and has the advantage of one less part since a resistor is not needed in series with the transistor base. However the voltage across the relay coil will be two diode drops less than the supply voltage, or about 11 volts for a 12.5 volt input. The common emitter configuration on the right offers the advantage of the full supply voltage across the load for most of the delay time, which makes the relay pull-in and drop-out voltages less of a concern but requires an extra resistor in series with transistor base. The common emitter (circuit on the right) is the better circuit since the series base resistor can be selected to obtain the desired delay time whereas the capacitor must be selected for the common collector (or an additional resistor used in parallel with the capacitor).
The time delay for the common emitter will be approximately 3 time constants or 3*R*C. The capacitor/resistor values can be worked out from the relay coil current and transistor gain. For example a 120 ohm relay coil will draw 100 mA at 12 volts and assumming a transistor gain of 30, the base current will be 100/30 = 3 mA. The voltage across the resistor will be the supply voltage minus two diode drops or 12-1.4 = 10.6. The resistor value will be the voltage/current = 10.6/0.003 = 3533 or about 3.6K. The capacitor value for a 15 second delay will be 15/3R = 1327 uF. We can use a standard 1000 uF capacitor and increase the resistor proportionally to get 15 seconds.
Source: bowdenshobbycircuits.info
The two circuits di atas illustrate opening a relay contact a short time after the ignition or ligh switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to 12 volts. The circuit on the left is a common collector or emitter follower and has the advantage of one less part since a resistor is not needed in series with the transistor base. However the voltage across the relay coil will be two diode drops less than the supply voltage, or about 11 volts for a 12.5 volt input. The common emitter configuration on the right offers the advantage of the full supply voltage across the load for most of the delay time, which makes the relay pull-in and drop-out voltages less of a concern but requires an extra resistor in series with transistor base. The common emitter (circuit on the right) is the better circuit since the series base resistor can be selected to obtain the desired delay time whereas the capacitor must be selected for the common collector (or an additional resistor used in parallel with the capacitor).
The time delay for the common emitter will be approximately 3 time constants or 3*R*C. The capacitor/resistor values can be worked out from the relay coil current and transistor gain. For example a 120 ohm relay coil will draw 100 mA at 12 volts and assumming a transistor gain of 30, the base current will be 100/30 = 3 mA. The voltage across the resistor will be the supply voltage minus two diode drops or 12-1.4 = 10.6. The resistor value will be the voltage/current = 10.6/0.003 = 3533 or about 3.6K. The capacitor value for a 15 second delay will be 15/3R = 1327 uF. We can use a standard 1000 uF capacitor and increase the resistor proportionally to get 15 seconds.
Source: bowdenshobbycircuits.info
Regulator Variable Sederhana
Skema Rangkaian Regulator Variable Sederhana
The collector of the NPN feeds the base of a larger PNP power transistor
which supplies most of the current to the load. The output voltage will
be about 0.7 volts below the voltage of the wiper of the 1K pot so the
output can be adjusted from 0 to the full supply voltage minus 0.7
volts. Using two transistors provides a current gain of around 1000 or
more so that only a couple milliamps of current is drawn from the
voltage divider to supply a couple amps of current at the output.
Note that this circuit is much less efficient than the 555 timer dimmer circuit using a variabe duty cycle switching approach. A fairly large heat sink is required to prevent the PNP power transistor from overheating. The advantage of the circuit is simplicity, and also that it doesn't generate any RF interference as a switching regulator does. The circuit can be used as a voltage regulator if the input voltage remains constant.
Note that this circuit is much less efficient than the 555 timer dimmer circuit using a variabe duty cycle switching approach. A fairly large heat sink is required to prevent the PNP power transistor from overheating. The advantage of the circuit is simplicity, and also that it doesn't generate any RF interference as a switching regulator does. The circuit can be used as a voltage regulator if the input voltage remains constant.
Wednesday, July 25, 2012
220V AC Ultra Bright LEDs lamp Circuit
This ultra-bright white LED
lamp works on 230V AC circuit with minimal power consumption.
Ultra-bright LEDs available in the market cost Rs 8 to 15. These LEDs
emit a 1000-6000mCd bright white light, like the welding arc and work
on 3 volts, 10 mA. Their maximum voltage is 3.6 volts and the current
is 25 mA. Anti-static precautions taken Pls Should Be handling the
LEDs. The LEDs in a water-clear plastic package emit spotlight, while
diffused type LEDs have a wide-angle radiation pattern.
220V AC Ultra Bright LEDs lamp CircuitThe schematics circuit of above employs capacitive reactance for limiting the current flow through the LEDs on the application of mains voltage to the circuit. We use only if a series resistor for limiting the current with mains operation. The 100-ohm, 2W resistor series avoids heavy 'inrush' During current transients. MOV at the input prevents surges or spikes, protecting the circuit. The 390-kilo-ohm, ½-watt resistor acts as a bleeder to Provide discharge path for capacitor Cx Pls mains supply is disconnected. The zener diode at the output section prevents excess levels of reverse voltage appearing across the LEDs During the negative half-cycles. During the positive half cycle, the voltage across the LEDs is limited to the zener voltage.
16-LED/46-LED combination
Aseries
combination of 16 LEDs Gives a luminance (lux) equivalent of a 12W
bulb. But if you have two series combinations of 23 LEDs in parallel
(Total 46 LEDs), it Gives equal to a 35W light bulb.
Diode D1 (1N4007) and capacitor C1 act as rectifying and smoothing elements to Provide DC voltages to the row of LEDs. For a 16-LED row, use Cx of 12:22 μF, 630V; C1 of 22 μF, 100V; and zener of 48V, 1W. Similarly, for 46 LEDs combination use Cx of 0:47 mF, 630V; C1 of 33 μF, 150V; and zener of 69V, 1W. This circuit (inclusive of LEDs) costs Rs 200 to Rs 400.
10 LED VU Meter Using IC LM3914
This 10 LED VU meter circuit has only a few parts but is useful as an
indicator for the measurement of entering acoustic signals. The circuit
is a perfect one chip replacement for the standard analog meters. It is
completely solid state and will never wear out
LM3914 VU Meter Circuit
The circuit is built around an LM3914 IC. The input signal from the VU
meter is put on pin 5 of IC1. Through pin 9 of IC1 is the display mode
sets (bar or dot instructions). In the drawn state IC1 works in the dot
mode. When pin 9 is coupled to pin 3, the IC works in bar mode.
Obviously the whole circuit consumes less power in dot mode.
List Component
C1 : 2.2uF/ 25V Electrolytic Capacitor R1 : 1K Resistor D1 : 1N4002 Diode LED1-LED : 10 x LED or LED Array U1 : LM3915
Notes
- V+ can be anywhere from 3V to 20V.
- The input is designed for standard audio line voltage with has a maximum input voltage of 1.3V.
- Pin 9 can be disconnected from ground to make the circuit use a moving dot display instead of a bar graph display.
Light/Dark Switch With Relay
Thursday, May 19, 2011
Light/Dark Switch With Relay
Light/Dark switch Circuit with relay
As
you may have notice, the 741 is connected as a voltage comparator. Two
voltage dividers are easy to be found: The first one is the10K resistor
and the LDR . The second one is composed by the two 470 Ohms resistors
and the potentiometer. Both the outputs of the dividers are connected
as inputs to the voltage comparator.
The second voltage divider will settle the reference voltage. The first voltage comparator that contains the LDR, will change it's voltage according to the light level. When the voltage across the negative input of the comparator is less than the voltage to the positive input of the comparator, the output is held low. When the voltage on the negative input rises, there will be a time that it becomes greater than or equal to the positive (pre-selected) voltage, and then the output becomes high and the relay through the 2N2222 is actuated.
The second voltage divider will settle the reference voltage. The first voltage comparator that contains the LDR, will change it's voltage according to the light level. When the voltage across the negative input of the comparator is less than the voltage to the positive input of the comparator, the output is held low. When the voltage on the negative input rises, there will be a time that it becomes greater than or equal to the positive (pre-selected) voltage, and then the output becomes high and the relay through the 2N2222 is actuated.
Showing posts with label Adaptor/ Regulator. Show all posts
Showing posts with label Adaptor/ Regulator. Show all posts
Tuesday, December 28, 2010
Rangkaian Regulator Variable Sederhana
Regulator Variable SederhanaA simple but less efficient method of
controlling a DC voltage is to use a voltage divider and transistor
emitter follower configuration. The figure below illustrates using a 1K
pot to set the base voltage of a medium power NPN transistor.Skema
Rangkaian Regulator Variable SederhanaThe collector of the NPN feeds...
Friday, December 25, 2009
Rangkaian Power Supplay
Electronic devices should be powered by direct current supply DC
(direct current) which is stable in order to work properly. The battery
or batteries is a source of DC power supply is best. But for
applications that require greater power supply, the source of the
battery is not enough. Sources of power supply is a source of
alternating AC...
Tuesday, December 22, 2009
1.25V-15.19V Regulator/Adaptor Variabel Digital
Rangkaian Regulator/Adaptor Variabel DigitalThis is a series regulator
with variable output from the digital 1.25V to 15.19V The first section
of the circuit comprises a digital up-down counter built around IC1, a
quad 2-input NAND Schmitt trigger (IC CD4093), followed by IC2, a
binary up-down counter (CD4029 IC). Two gates of IC CD4093...
Sunday, December 20, 2009
Rangkaian USB Power Boster (USB Adaptor )
USB Power Boster (USB Adaptor )USB can be configured for connecting
several peripheral devices to a single PC, Since a PC can supply only a
limited power to the external devices connected through its USB port,
when too many devices are connected simultaneously, there is a
possibility of power shortage, Therefore an external power source...
Thursday, December 17, 2009
Regulator 5 volt Meggunakan IC 7805
Regulator 5 volt IC 7805The IC 7805 provides circuit designers with an
easy way to regulate DC voltages to 5v. Encapsulated in a single
chip/package (IC), the 7805 is a positive voltage DC regulator that has
only 3 terminals. They are: Input voltage, Ground, Output Voltage.Skema
rangkaian regulator 5 voltLayout IC 7805Although the 7805 were...
Wednesday, December 16, 2009
Adaptor 12 volt menggunakan 2n3055
Rangkaian Adaptor 12 volt 2n3055This adapter circuit can deliver up to
3A at 12V output voltage. The circuit can be employed on occasions when
a current of more that 3A is demanded for regulator. IC regulators of
such high current rating are pretty hard to find.The transformer T1
steps down mains voltage, to 12rms & the rectifier bridge...
+12Volt|-12Volt Dual Regulator Power Supplay
This is of a dual regulated that provides +12V and -12V from the AC
mains. A regulator like this is a very essential tool on the work bench
of an electronic hobbyist.Transformer T1 steps down the AC mains
voltage and diodes D1, D2, D3 and D4 does the job of rectification.
Capacitors C1 and C2 does of filtering.C3, C4, C7and C8 are
decoupling...
Wednesday, October 14, 2009
Rangkaian Car Regulator Converter
This is car regulator 12 VDC to 9 VDC converters side for audio,
playstation,DVD,etc... The regulator designed for 12DC to 9DC
converters that we bring to our design circuit . They are all effective
in Switch Mode Power Supplies regulated output. We have developed a
series of DC-DC power supply models ranging from 1 watt to 500 watts,...
Monday, August 17, 2009
Rangkaian +5V Switching regulator
Rangkaian +5V Switching regulator used LM2575-5.0. You can make the
stable voltage by using the 3 terminal regulator like LM317. However,
because the output electric current and the inputted electric current
are the same approximately, the difference between the input electric
power (The input voltage x The input electric current) and the...
Friday, August 14, 2009
Rangkaian Regulator menggunakan Op-Amp
Regulator is a series of regulations or the voltage output from power
so that a portion darinaik effects or voltage drop in net does not
affect the voltage ration power to be so stable.Regular circuit of
regulators have been good if the ripple voltage is small, but there is
a problem of stability. If the voltage PLN rise /down, then the...
Wednesday, August 12, 2009
Rangkaian Regulator menggunakan Diode Zener
Regulator is a circuit of regulations or the voltage output from a
ration resources so that the effects of increased tension or decrease
in net does not affect the voltage ration power to be so
stable.Rangkaian Dasar Regulator Diode ZenerSimple circuit regulator ,
working on the zener breakdown voltage so that it produces the same
output...
Saturday, July 18, 2009
Variable Adaptor ( 3 , 4 , 5, 9, 12 sampai 37 volt)
Variable Adapter (3 , 4 ,5 ,9 ,12 ,16 ,20 to max 37 volt)The LM117
series of adjustable 3-terminal positive voltage regulators is capable
of supplying in excess of 1.5A over a 1.2V to 37V output range. They
are exceptionally easy to use and require only two external resistors
to set the output voltage. Further, both line and load...
Sunday, May 10, 2009
Thursday, February 19, 2009
ADAPTOR 12 VOLT 20 AMPERE
Now it should not have to wrestle again seek op-amp, transistor and
other components to realize a massive circuit of regulators, because
the circuit of this kind have been packed into a fixed voltage
regulator IC. Currently, many components known as the 78XX series fixed
positive voltage regulator and the 79XX series is a voltage regulator...
220V AC Operated Christmas Light Star Circuit
220V AC Operated Christmas Light Star Circuit
Here is a simple circuit of
Christmas light star that can be easily constructed even by a novice.
The main advantage of this circuit is that it doesn’t require any
step-down transformer or ICs.
Circuit of 220V AC Operated Christmas Light Star
Components
like resistors R1 and R2, capacitors C1, C2, and C3, diodes D1 and D2,
and zener ZD1 are used to develop a fairly steady 5V DC supply voltage
that provides the required current to operate the multivibrator circuit
and trigger triac BT136 via LED1. The multivibrator circuit is
constructed using two BC548 transistors (T1 and T2) and some passive
components. The frequency of the multivibrator circuit is controlled by
capacitors C4 and C5 and resistors R3 through R7. The output of the
multivibrator circuit is connected to transistor T3, which, in turn,
drives the triac via LED1. During positive half cycles of the
multivibrator’s output, transistor T3 energises triac BT136 and the
lamp glows. This circuit is estimated to cost Rs 75.
Note:
This circuit directly connected to the netting of electricity, voltage 220V electricity it could sting you. Avoid working in damp and directly with ground
Circuit Design By: PRINCE PHILLIPS
Source: www.electronicsforu.comwww.electronicsforu.com
Hukum Hukum Rangkaian Teknik Elektro
Hukum Kirchoff Arus|Kirchoff tegangan
- Hukum Kirchoff ArusStates that "all the algebraic number of the flow
enters a knot / point in the series is a zero" or "the amount of flow
that enters the knot in a series with the same amount of flow that is
out of the knot."Expressed mathematically withAs an illustration shown
in the picture below:So based on the law applicable kirchof...
Hukum Ohm
Hukum OhmStates that "the voltage across the various types of materials
are proportionate with the straight flow of the stream." Mathematically
expressed by:Ohm's law formula can be derived as follows:V is the
voltage (in volt), I is the current that flows (in ampere) and R is
resistansi or obstacles (in ohm, Ω) which is 1 ohm value is equal...
Arus |Tegangan|Daya||Energi Listrik
Arus listrik|Electric current (I)Electric current states that the
number of load flow in a certain direction on a series of electrical
elements of each unit of time. Mathematically expressed by:with,I:
electric current (in ampere)Q: electric load (in coulomb)t: time (in
seconds)Than the electric current magnitude have also have a
direction...
Analisis Nodal/Simpul/Titik -Analisa Rangkain Elektronika
Analisis Nodal/Simpul/Titik Untuk mempermudah Analisa Rangkain
ElektronikaNodal / Simpul /titik Analysis By using this method, we will
first obtain the size of the voltage on each of a series in which later
can be used to explore the amount of electricity the other.Stages to
implement a Nodal / Simpul / Titik Analysis is this:1. Determine...
Tuesday, July 21, 2009
Analisis Loop/Mesh Pada Rangkaian Elektronika
Analisis Loop/Mesh Pada Rangkaian ElektronikaStages to implement the
Loop Analysis / Mesh is this:1. Determine the direction of flow in each
loop in the series. Usually selected with the clockwise direction.2.
Determine the polarity of each element in the series.a. In the source:
cash flow from the polarity (-) to the polarity (+)b. In the...
Transformasi Sumber
Transformasi Sumber When we apply a method to analyze a series of DC,
may be necessary to change the source of flow into voltage source or
voltage source into a source flow.Not any source can be transformed. A
voltage source in series with the new resistans can be transformed into
a source of flow in parallel with resistans. Instead of a...
Teorema Thevenin - Analisis Rangkaian Elektronika
Teorema Thevenin untuk menganalisis Rangkaian DCThevenin theorems
states that any two of the series can be converted into an equivalent
set of which consists of a voltage source thevenin (ETH) and a
resistans equivalent thevenin (RTH) is in series with voltage source
thevenin.Steps to find the rope thevenin is:1. Specify two of the
series...
Teorema Norton-Analisis Rangkaian Listrik
Teorema Norton untuk menganalisis Rangkaian listrik DCNorton theorems
is that, any two of the series can be converted into an equivalent set
of which consists of a current source (IN) and a norton equivalent
resistans (RN) with a source flow dipararel it.Steps to find the rope
it is:1. Specify two of the series who want to search string...
This circuit is of a street light that automatically
switches ON when the night falls and turns off when the sun rises. In
fact you can this circuit for implementing any type of automatic night
light. This circuit can be used to control lights or other electrical equipment with large power to hundreds of watts
The
circuit used an LDR to sense the light . When there is light the
resistance of LDR will be low. So the voltage drop across POT R2 will
be high. This keeps the transistor Q1 ON. The collector of Q1(BC107) is
coupled to base of Q2(SL100). So Q2 will be OFF and so do the relay.
The bulb will remain OFF.
When
night falls the resistance of LDR increases to make the voltage across
the POT R2 to decrease below 0.6V. This makes transistor Q1 OFF which
in turn turs ON Q2.The relay will be energized and the bulb will glow.
Skema rangkaian control lampu jalan dengan LDR* POT R2 can be used to adjust the sensitivity of the circuit.
* You can use bulb of any wattage ,provided that relay should have the sufficient rating.
* The circuit can be powered from a regulated 9V DC power supply.
* Click Here! to get the power supply circuit for this project.
* The relay K1 can be a 9V SPDT relay.
A bout LDR ( Light Dependent Resistor )
Working
principle of LDR is the LDR resistance will change with changes in
light intensity about it. In the dark resistance of LDR about 10MΩ and
in light of 1KΩ or less. LDR is made from semiconductor materials such
as cadmium sulfide. With this material the energy of the light that
falls cause more load to the electric current is released or increased.
This means that the material resistance has decreased.
LDR
is used to convert light energy into electrical energy. Automatic light
switches and burglar alarms are a few examples of tools that use the
LDR. However, because the response to light is slow, LDR is not used in
situations where the intensity of light changed drastically.
LDR ( Light Dependent Resistor ) pic
Saturday, July 21, 2012
Cara Kunci Hardisk Supaya Tidak Bisa Di Copy Ke FlashDisk
Cara Kunci Hardisk Supaya Tidak Bisa Di Copy Ke FlashDisk berguna untuk mengamankan file-file yang ada di dalam komputer dari teman atau orang lain yang ingin copy paste file yang ada di komputer kamu. Hal ini bekerja untuk OS Windows SP1,SP2, SP3, Windows Server 2003 and 2008, Vista dan Windows7. Kalau ada yang ingin mencobanya silahkan saja.
Berikut Cara Kunci Hardisk Supaya Tidak Bisa Di Copy Ke FlashDisk :
1. klik start >> run ketik regedit
2. cari HKEY_LOCALMACHINE\SYSTEM\CurrentControlSet\Control
3. di folder CONTROL, Klik kanan -> New -> Key
terus namain folder baru itu -> "StorageDevicePolicies"
4. lalu di folder "StorageDevicePolicies", Klik kanan > New > Dword (32-bit)
5. key yang baru itu namain : "WriteProtect"
6. klik 2x Key WriteProtect-nya, trus ganti Value Data jadi 1
Untuk mengembalikannya menjadi normal kembali tinggal edit saja Value Data dari key yang namanya "WriteProtect" itu jadi 0 (nol)
Friday, July 20, 2012
Software Gratis Alternatif pengganti DeepFreeze
Software Gratis Alternatif pengganti DeepFreeze
Bagi
sebagian besar kita mungkin tidak asing lagi dengan program/software
yang satu ini, DeepFreeze. Merupakan salah satu software yang cukup
populer untuk proteksi komputer dari berbagai masalah (virus, malware,
error installasi program dsb). Teknik yang digunakan adalah dengan
mengembalikan sistem komputer ke keadaan sebelumnya setelah restart.
DeepFreeze
merupakan program berbayar, jika kita ingin mendapatkan fitur sejenis
tetapi dengan program gratis, berikut altenatifnya.
Returnil Virtual System (RVS) 2010 Home Free
RVS 2010 merupakan software kombinasi antara
antivirus, anti-malware dan virtualisasi sistem yang bertujuan untuk
melindungi komputer dari berbagai serangan/infeksi virus dan sejenisnya.
RVS 2010 Home Free bisa kita gunakan grais untuk personal dan
non-commercial.
Berikut beberapa fitur RVS 2010 Home Free :
- Virus Guard, Antivirus yang memonitor secara realtime (terus menerus)
- Sistem safe (virtusl sistem), untuk mengembalikan keadaan komputer seperti sebelunya. Seperti halnya DeepFreeze.
- Virtual Disk, mampu membuat virtual disk/partisi.
- Access Protection, untuk menjaga komputer dari penggunaan yang tidak di inginkan
- Message Center, memberikan berbagai informasi berkaitan dengan keamanan/infeksi virus.
- Berbagai fitur lainnya
Salah
satu fitur yang merupakan alternatif DeepFreeze adalah kemampuan untuk
mengembalikan keadaan sistem seperti sebelumnya. Jadi ketika komputer
sudah terinfeksi virus, maka komputer bisa dikembalikan ke keadaan
sebelumnya. Data atau Update yang sudah tersimpan pun akan terhapus jika
dilakukan recovery, sehingga pastikan untuk menon-aktifkan terlebih
dahulu RVS 2010 ketika melakukan update dan perubahan penting lainnya.
Lebih detailnya silahkan melihat halaman Returnil Virtual System 2010 Home FreeDownload RVS 2010 Free( 33.1 MB)
Windows SteadyState
Sebagai pembuat Sistem operasi, Microsoft pun tidak
ketinggalan memberikan software untuk proteksi sistem yang mempunyai
fitur seperti deepfreeze. Meskipun sederhana fitur yang sudah di
integrasikan (system restore) menyediakan fitur ini, tetapi tidak jarang system restore malah digunakan virus untuk menggandakan diri.
Windows SteadyState yang sebelumnya bernama Shared Computer Toolkit, di design dengan fitur-fitur seperti berikut :
- Mengatur komputer sharing lebih mudah dan aman
- Mengunci user interface, sehingga lokasi penting tidak dapat diijinkan di akses oleh user tertentu.
- Mengembalikan komputer ke keadaan sebelumnya setelah restart.
Fitur
terakhir ini yang mirip dengan DeepFreeze. Ketika Disk Protection
diaktifkan, akan membuat semacam cache file dan memantau setiap
perubahan sistem operasi atau direktori program. Pada interval yang bisa
ditentuan cache ini bisa dihapus dan mengembalikan keadaan komputer
seperti sebelumnya. Download software ini berlaku untuk pengguna Windows
XP atau Vista Original
Download dan Informasi selengkapnya : Windows SteadyState
Tip Mengamankan Sistem Operai berbasis Windows
Dibawah ini saya tuangkan beberapa cara atau tip bagaimana cara mengamankan komputer yang menggunakan sistem operasi Win XP atau Win 7, mudah-mudahan menjadi bermafaat buat kita semua, namun tulisan ini gak menjadi 100% aman, karena banyak sekali hacker-hacker kecil khususnya di kota Tangerang, yang pintar bermain hacking dan cracking, sebagai contoh, mereka bisa menjebol OS berbasis windows yang dipasang deepfreeze versi terbaru pun masih bisa dijebol........,
1. Menggunakan Password BIOS
Cara ini merupakan cara yang aman, karena dapat memproteksi computer agar tidak bisa dipergunakan seenaknya oleh orang lain, selain itu, password bios akan memproteksi pengaturan-pengaturan yang berisi informasi salah satunya mengenai BIOS. Jika komputer anda sudah terpasang deep freeze, cara ini sangat lah berguna karena jika seseorang ingin melakukan hacking terhadap deep freeze maka orang itu akan menemui hambatan, karena BIOS sudah terpasang password.
2. Aktifkan firewall
Firewall memiliki peran yang sangat penting dalam keamanan sistem operasi, karena firewall sendiri untuk me-remote port-port yang terbuka, karena pada umumnya port yang terbuka akan menjadi jalan masuk bagi si hacker, virus, spyware, dll apalagi jika port-port itu tidak terproteksi.
3. Matikan service yang tidak diperlukan
Tujuannya ialah meminimalisir ancaman-ancaman yang mungkin terjadi, karena biasanya suatu program jahat akan membuat service tersendiri yang akan berjalan secara otomatis ketika computer dihidupkan.
4. Gunakan NTFS pada harddisk
Hal ini dilakukan agar anda sebagai administrator dapat menggunakan fasilitas permission untuk mengatur user dalam hal pembatasan hak akses. Fasilitas permission ini hanya di dapat jika menggunakan NTFS, jika menggunakan FAT atau FAT32 mungkin tidak ada.
5. Gunakan AntiVirus terbaru
Sepertinya ini sudah tidak asing lagi, namun biar begitu peran antivirus sendiri amatlah penting, karena pada dasarnya cara kerja antivirus ini akan memfilter file, proses di task manager, email, website berbahaya, hingga mendeteksi ancaman-ancaman lain yang tidak kita ketahui. Biasanya antivirus terbaru akan memiliki fasilitas tambahan, seperti spyware, rootkit, link scanner, email protection serta identity protection.
Hmm..saya rasa hanya segitu, jika ada lagi saya akan menambahkannya lagi..
Untuk yang kedua, ini akan membahas tentang cara mengamankan sistem operasi Windows 7
1. Gunakan Windows Defender
Windows defender sudah ada ketika menginstal windows, namun kita pastikan apakah sudah aktif apa tidak. Manfaat dari windows defender ini antara lain mencegah spyware & virus yang akan menginfeksi sistem operasi serta mencegah software berbahaya.
2. Aktifkan UAC
Tujuan dari UAC atau User Account Control ini akan meminta izin kepada anda sebagai Administrator sebelum menginstal perangkat lunak atau membuka jenis program tertentu yang berpotensi membahayakan computer Anda atau membuatnya rentan terhadap ancaman keamanan.
3. Backup
Ini bertujuan mengamankan file-file serta dokumen penting lainnya dari bahaya di masa akan datang yang kemungkinan akan terjadi kehilangan atau kerusakan pada file file tersebut yang diakibatkan oleh virus, program error maupun human error itu sendiri.
4.Aktifkan Firewall
Ini sama pentingnya dengan sistem operasi windows XP. Firewall ini untuk membantu mencegah hacker dan perangkat lunak berbahaya yang tidak diinginkan. Biasanya perangkat lunak ini diam-diam mengakses internet untuk mengirimkan hasil data-data curian kepada si pembuat software.
5. Matikan fasilitas Automatic Updates
Jika anda menggunakan Windows bajakan, ada baiknya untuk mematikan fasilitas Automatic Updates ini, namun saya sarankan agar menggunakan Windows asli, selain menguntungkan juga dapat up to date mengenai security windows serta update-update terbaru dari microsoft.
1. Menggunakan Password BIOS
Cara ini merupakan cara yang aman, karena dapat memproteksi computer agar tidak bisa dipergunakan seenaknya oleh orang lain, selain itu, password bios akan memproteksi pengaturan-pengaturan yang berisi informasi salah satunya mengenai BIOS. Jika komputer anda sudah terpasang deep freeze, cara ini sangat lah berguna karena jika seseorang ingin melakukan hacking terhadap deep freeze maka orang itu akan menemui hambatan, karena BIOS sudah terpasang password.
2. Aktifkan firewall
Firewall memiliki peran yang sangat penting dalam keamanan sistem operasi, karena firewall sendiri untuk me-remote port-port yang terbuka, karena pada umumnya port yang terbuka akan menjadi jalan masuk bagi si hacker, virus, spyware, dll apalagi jika port-port itu tidak terproteksi.
3. Matikan service yang tidak diperlukan
Tujuannya ialah meminimalisir ancaman-ancaman yang mungkin terjadi, karena biasanya suatu program jahat akan membuat service tersendiri yang akan berjalan secara otomatis ketika computer dihidupkan.
4. Gunakan NTFS pada harddisk
Hal ini dilakukan agar anda sebagai administrator dapat menggunakan fasilitas permission untuk mengatur user dalam hal pembatasan hak akses. Fasilitas permission ini hanya di dapat jika menggunakan NTFS, jika menggunakan FAT atau FAT32 mungkin tidak ada.
5. Gunakan AntiVirus terbaru
Sepertinya ini sudah tidak asing lagi, namun biar begitu peran antivirus sendiri amatlah penting, karena pada dasarnya cara kerja antivirus ini akan memfilter file, proses di task manager, email, website berbahaya, hingga mendeteksi ancaman-ancaman lain yang tidak kita ketahui. Biasanya antivirus terbaru akan memiliki fasilitas tambahan, seperti spyware, rootkit, link scanner, email protection serta identity protection.
Hmm..saya rasa hanya segitu, jika ada lagi saya akan menambahkannya lagi..
Untuk yang kedua, ini akan membahas tentang cara mengamankan sistem operasi Windows 7
1. Gunakan Windows Defender
Windows defender sudah ada ketika menginstal windows, namun kita pastikan apakah sudah aktif apa tidak. Manfaat dari windows defender ini antara lain mencegah spyware & virus yang akan menginfeksi sistem operasi serta mencegah software berbahaya.
2. Aktifkan UAC
Tujuan dari UAC atau User Account Control ini akan meminta izin kepada anda sebagai Administrator sebelum menginstal perangkat lunak atau membuka jenis program tertentu yang berpotensi membahayakan computer Anda atau membuatnya rentan terhadap ancaman keamanan.
3. Backup
Ini bertujuan mengamankan file-file serta dokumen penting lainnya dari bahaya di masa akan datang yang kemungkinan akan terjadi kehilangan atau kerusakan pada file file tersebut yang diakibatkan oleh virus, program error maupun human error itu sendiri.
4.Aktifkan Firewall
Ini sama pentingnya dengan sistem operasi windows XP. Firewall ini untuk membantu mencegah hacker dan perangkat lunak berbahaya yang tidak diinginkan. Biasanya perangkat lunak ini diam-diam mengakses internet untuk mengirimkan hasil data-data curian kepada si pembuat software.
5. Matikan fasilitas Automatic Updates
Jika anda menggunakan Windows bajakan, ada baiknya untuk mematikan fasilitas Automatic Updates ini, namun saya sarankan agar menggunakan Windows asli, selain menguntungkan juga dapat up to date mengenai security windows serta update-update terbaru dari microsoft.
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