My Hobby

Homemade AC ( Air Conditioner)

noreply@blogger.com (Asepwungkul) — Thu, 10 Sep 2009 14:22:00 +0000

Anti terror Equipment

noreply@blogger.com (Asepwungkul) — Sat, 22 Aug 2009 09:13:00 +0000

Pemancar TV mini 1 km.

noreply@blogger.com (Asepwungkul) — Sat, 18 Jul 2009 12:20:00 +0000

Use it to rebroadcast video signals

Transmitter
throughout your house.

BY asepwungkul

One of the most useful gadgets a video
enthusiast can have is a low-power TV
Transmitter. Such a device can transmit a
signal from a VCR to any TV in a home or
backyard. Imagine the convenience of
being able to sit by the pool watching your
favorite movie on a portable with a tape or
laserdisc playing indoors. You could even
retransmit cable TV for your own private
viewing. Videotapes can be dubbed from

one VCR to another without a cable
connecting the two machines together.
When connected to a video camera, a TV
transmitter can be used in surveillance for
monitoring a particular location.

The main problem a video enthusiast
has in obtaining a TV transmitter is that a
commercial units are expensive. However,
we have some good news! You can build
the TV Transmitter described here for less

The range of channels is wide
enough so that the unit will not
interfere with other TV viewers
who are nearby. To comply
with FCC rules, it is mandatory
the nearby TV viewers are not
disturbed by the transmission. If
your activities interfere with the
reception from a licensed
station, regardless of the reason,
you must shut down your unit.

TV Transmitter

WARNING!!
The publisher makes no representations
as to the legality of constructing and/or
using the TV Transmitter that is
referenced in this article. The
construction and/or use of the
transmitter described in this article may
violate federal and or state law. Readers
are advised to obtain independent
advice as to the propriety of its
construction and the use thereof based
upon their individual circumstances and
jurisdiction.

2way com. car to car

noreply@blogger.com (Asepwungkul) — Wed, 01 Apr 2009 13:18:00 +0000

Komunikasi dua arah, dengan menggunakan sinar inra merah antar pengendara motor atau mobil, untuk gambar ilustrasi dapat dilihat di gambar. dan skema circuit bisa aplikasi dari headphone wireless. produk jadi yang ada sekarang yaitu menggunakan bluetooth (dengan helmet) yang harganya masih diatas satu juta. dengan alat ini cukup murah meriah.

MP4 Car.Player with FM transmiter

noreply@blogger.com (Asepwungkul) — Sat, 21 Mar 2009 15:24:00 +0000

Fruity digital clock

noreply@blogger.com (Asepwungkul) — Sat, 31 Jan 2009 12:27:00 +0000

NEW YEAR CELEBRATION.

noreply@blogger.com (Asepwungkul) — Sat, 27 Dec 2008 11:23:00 +0000

Every time there is a celebration, it has become common to see people lighting crackers or fireworks. If you are one of those who enjoy watching colorful fireworks display or just about anything that has got to do with fireworks, you may like this device.

In fact it would help you from not getting your hand blown off while bursting crackers. The Launch Kontrol remote firework launcher can be used to detonate these fireworks and crackers and people can go ahead and have fun in relative safety. The remote works even at the distance of up to 75 feet.

One can launch up to 5 fireworks at a time and the remote system, which has 15 ‘e-clip’ igniters, costs $35 and an extra packet of 15 clips costs you $17. Looks like this festival season a lot of fireworks can be seen being lit.

Wireless/Remote control

noreply@blogger.com (Asepwungkul) — Sun, 30 Nov 2008 13:19:00 +0000

noreply@blogger.com (Asepwungkul) — Wed, 29 Oct 2008 15:40:00 +0000

How EL Lights work ?

noreply@blogger.com (Asepwungkul) — Fri, 26 Sep 2008 20:59:00 +0000

Electroluminescent (EL) devices are actually lamps. They emit light, but they are unlike any traditional lamp. Instead of creating light by heating a filament - as in an incandescent light bulb - or by charging a gas field - as in a fluorescent or neon tube, EL relies on phosphorescent materials which glow when exposed to a small electrical current. El lamps are cool, low power and emit a soft light without any irritating glare. They are invariably very thin, almost like ribbons or sheets of paper, and they can be produced in a variety of colors. The source of light is a phosphorous mixture which is spread onto a transparent, conductive ITO (indium tin oxide) film and then covered with another thin sheet of conductive material.
The color produced by an EL panel can be altered by changing the frequency of the voltage supplied to it and/or the amplitude of the voltage. It all depends on who manufactured the panel, its size and the type of inverter

The Solid state Relay

noreply@blogger.com (Asepwungkul) — Sat, 30 Aug 2008 01:33:00 +0000

One of the main disadvantages of an Electromechanical Relay (EMR) is that it is a "mechanical device", that is it has moving parts. Over a period of time these parts will fail, or that the contact resistance through the constant arcing and errosion may make the relay unusable and it will therefore need to be replaced. Also, they are electrically noisey with the contacts suffering from contact bounce which may affect any electronic circuits to which they are connected. There is another type of relay called a Solid State Relay or (SSR) for short which is a solid state contactless, pure electronic relay. It has no moving parts with the contacts being replaced by transistors, thyristors or triacs. The electrical seperation between the input control signal and the output load voltage is accomplished with the aid of an optocoupler type light sensor.

The Solid State Relay provides a high degree of reliability, long life and reduced electromagnetic interference (EMI), (no arcing contacts or magnetic fields), together with a much faster response, as compared to the conventional electromechanical relay. Also the input control power requirements of the solid state relay are generally low enough to make them compatable with most IC logic families without the need for additional buffers, drivers or amplifiers. However, being a semiconducor device they must be mounted onto suitable heatsinks to prevent the output switching semiconductor device from over heating.

The AC type Solid State Relay turns "ON" at the zero crossing point of the AC sinusoidal waveform, prevents high inrush currents when switching inductive or capacitive loads while the inherent turn "OFF" feature of thyristors and triacs provides an improvement over the arcing contacts of the electromechanical relays. Like EMR's an RC (Resistor-Capacitor) snubber network is generally required across the output terminals of the SSR to protect the semiconductor output switching device from noise and voltage transient spikes when used to switch highly inductive or capacitive loads and in most modern SSR's this RC snubber network is built as standard into the relay itself. Non-zero detection switching (instant "ON") type SSR's are also available for phase controlled applications such as the dimming or fading of lights at concerts, shows, disco lighting etc, or for motor speed control type applications.
As the output switching device of a solid state relay is a semiconductor device (Transistor for DC switching applications, or a Triac/Thyristor combination for AC switching), the voltage drop across the output terminals of an SSR when "ON" is much higher than that of the electromechanical relay, typically 1.5 - 2.0 volts. If switching large currents for long periods of time an additional heat sink will be required.
Input/Output Interface Modules.

Input/Output Interface Modules (I/O Modules) are another type of solid state relay designed specifically to interface computers, microcontrollers or PIC's to "real world" loads and switches. There are four basic types of I/O modules available, AC or DC Input voltage to TTL or CMOS logic level output, and TTL or CMOS logic input to an AC or DC Output voltage with each module containing all the necessary circuitry to provide a complete interface and isolation within one small device. They are available as individual solid state modules or intergrated into 4, 8 or 16 channel devices.
The main disadvantages of solid state relays (SSR's) compared to that of an electromechanical relay (EMR) are higher costs, only Single Pole Single Throw (SPST) types available, "OFF"-State leakage currents flow through the switching device, high "ON"-State voltage drop and power dissipation resulting in additional heatsinking requirements. Also they can not switch very small load currents or high high frequency signals such as audio or video signals.

LED=LHE (lampu hemat energi)4 future

noreply@blogger.com (Asepwungkul) — Sat, 19 Jul 2008 05:50:00 +0000

How can a Diode produce light ?

"Light is a form of energy that can be released by an atom. It is made up of many small particle-like packets that have energy and momentum but no mass. These particles, called photons, are the most basic units of light."
"Photons are released as a result of moving electrons. In an atom, electrons move in orbitals around the nucleus. Electrons in different orbitals have different amounts of energy. Generally speaking, electrons with greater energy move in orbitals farther away from the nucleus."
"For an electron to jump from a lower orbital to a higher orbital, something has to boost its energy level. Conversely, an electron releases energy when it drops from a higher orbital to a lower one. This energy is released in the form of a photon. A greater energy drop releases a higher-energy photon, which is characterized by a higher frequency. (Check out How Light Works for a full explanation.)"
"As we saw in the last section, free electrons moving across a diode can fall into empty holes from the P-type layer. This involves a drop from the conduction band to a lower orbital, so the electrons release energy in the form of photons. This happens in any diode, but you can only see the photons when the diode is composed of certain material. The atoms in a standard silicon diode, for example, are arranged in such a way that the electron drops a relatively short distance. As a result, the photon's frequency is so low that it is invisible to the human eye -- it is in the infrared portion of the light spectrum. This isn't necessarily a bad thing, of course: Infrared LEDs are ideal for remote controls, among other things."
"Visible light-emitting diodes (VLEDs), such as the ones that light up numbers in a digital clock, are made of materials characterized by a wider gap between the conduction band and the lower orbitals. The size of the gap determines the frequency of the photon -- in other words, it determines the color of the light."
In the next section we'll look at the advantages of LEDs.

LED Advantages

"While all diodes release light, most don't do it very effectively. In an ordinary diode, the semiconductor material itself ends up absorbing a lot of the light energy. LEDs are specially constructed to release a large number of photons outward. Additionally, they are housed in a plastic bulb that concentrates the light in a particular direction. As you can see in the diagram, most of the light from the diode bounces off the sides of the bulb, traveling on through the rounded end."
"LEDs have several advantages over conventional incandescent lamps. For one thing, they don't have a filament that will burn out, so they last much longer. Additionally, their small plastic bulb makes them a lot more durable. They also fit more easily into modern electronic circuits."
"But the main advantage is efficiency. In conventional incandescent bulbs, the light-production process involves generating a lot of heat (the filament must be warmed). This is completely wasted energy, unless you're using the lamp as a heater, because a huge portion of the available electricity isn't going toward producing visible light. LEDs generate very little heat, relatively speaking. A much higher percentage of the electrical power is going directly to generating light, which cuts down on the electricity demands considerably."
"Up until recently, LEDs were too expensive to use for most lighting applications because they're built around advanced semiconductor material. The price of semiconductor devices has plummeted over the past decade, however, making LEDs a more cost-effective lighting option for a wide range of situations. While they may be more expensive than incandescent lights up front, their lower cost in the long run can make them a better buy. In the future, they will play an even bigger role in the world of technology."
"For more information on LEDs and other semiconductor devices, check out the links in the next section."

Ide dasar pembuatan Jam Gadang Digital

noreply@blogger.com (Asepwungkul) — Thu, 19 Jun 2008 14:56:00 +0000

Jam Gadang Digital

CARA PASANG KLAKSON MOTOR-MOBIL YANG BENAR

noreply@blogger.com (Asepwungkul) — Wed, 14 May 2008 14:36:00 +0000

Pasang Relay..

Fungsi relay gunanya shortcut kelistrikan ke coil klakson untuk mengurangi beban arus yang besar,sehinnga swicth utama lebih awet.tidak tebakar,panas dsb.

Pembangkit listrik tenaga angin... Wussh Wush..

noreply@blogger.com (Asepwungkul) — Tue, 08 Apr 2008 13:17:00 +0000

Kincir angin(mini) dari barang bekas. persiapan alat:

1 Volt meter (untuk mencheck adanya arus listrik)

2 kabel dua jalur panjang secukupnya

3 Dinamo bekas CD driver/Player

4 Penjepit Besi dan tiang penyangga

5 Plastik oval (telur) mainan anak 4 buah+kayu bulat,lem. Lihat gambar.