Archive for April, 2012
Long time digital relays have been effective in blocking – the relay will not work until the receive the command. A security system sends this command only at a resolution of a trip, and not when the car lights flashing and siren screaming hysterically. But what prevents hijacker bring security system, similar installed on the vehicle by connecting it to the cigarette lighter, to simulate the disarming? To protect against this in the management team include the serial number. Number does not match – the relay is not activated. Constant and variable code there Another danger: as long as relay itself is able to recognize a digital command, so you can make a device that just detects such a command, and then, if necessary, will even be able to repeat it. Kinda recorder.
If the command to restore a locked chain every time the same, then the thief can reproduce it with a tape recorder. To protect against such attacks, the command code make the variables every time new play already 'spent' code does not result in resolution of the engine. How to pass command to the digital switch? 'Wireless' control relay or the wire (data bus)? You can connect the alarm system and digital relay wire, as was the case with analog control, and pass on the wire team. Such control is called managed by a dedicated wire or bus. Its advantages include good Immunity and the complexity of connecting 'the tape'. The disadvantage – the fact that the output relay can be found by tracing where he goes wire management.
Light and sound fill our life a great variety of experiences. Life of mankind in the absence of these components would have been unbearable – the realm of silence and absolute darkness. Sound and light very much affect the entire human body as a whole. People relax quietly relaxing music, dim lights, the lack of colorful tones and volume and rhythm of the music with lush color spots created excitatory effect. Because of the importance of light and sound on the human body should be given special attention to lighting and sound equipment room. This is especially important for facilities specially designed for recreation. Equipment discotheques and clubs should fully comply with its intended purpose.
Most key components of modern discotheques are just sound and light installation. Moreover, it is necessary note that this is equal to self-importance of the system and sound equipment as important as light. These elements are not able to function without each other. Sound equipment is important and should be mounted on a professional level. It does not matter what club you intend to create – large or small, "only to their" what image for your club you choose – the highest priority to audio equipment was a professional. To audio equipment for discotheques and clubs include loudspeakers, power amplifiers, audio, megaphones, wireless microphones, alarm systems, mixers, etc. All of these components create a single structure. Professional speaker systems make it possible not just to listen to music and enjoy it.
Speaker system – a key element disco, without this attribute it can not simply function. Power amplifiers sound as their name implies, amplify various sound effects. Warning systems make it possible to avoid embarrassing incidents of various, often occur in places crowds. With wireless microphones leading show programs can directly communicate with the audience. To organize such an event as karaoke, absolutely unreal without wireless microphones. If the club is Experienced DJs, then you must install a mixing console, which allowed to improvise with different sound effects. The role of lighting equipment in the maintenance of a disco as important as sound. Miscellaneous spotlights, strobe lights, etc., necessary for any club or disco. Professional level sound and lighting equipment will provide the club popularity and people will enjoy a disco until early morning. Achieve a competent balance of sound and light can only use decent equipment.
Accordingly, in the process of exploitation fax periodically need to replace these supplies. However, unlike the fuser toner and opc drum for laser fax machines are designed a few thousand copies, and the replacement of the drum is made in 3-5 changes of toner, so the cost of copies obtained in this apparatus is substantially lower than in the case of thermal transfer fax. And if we take into note that any fax machine has a copy function and can be used also as a copy machine, laser fax machines are the most preferred for use in the office for medium and large workflow. The cost of laser fax machines has steadily decreased, which also contributes to their spread. For example, the simplest model of Panasonic KX-FL403 costs less than $ 300 and allows you to receive copies of standard resolution of 600 x 600 dots per inch, has increased the rate of data reception (up to 14400 kbit / s) and print speeds up to 10 pages per second. Slightly more expensive fax KX-FLC413, which included besides the usual have a wireless handset dect. In operation of these devices is also very burdensome: once in about 2000 copies to replace the toner, and a 10000 – drum set, supplies for 10000 copies would cost about $ 200 Another group of devices which we will – so-called multifunction printers (MFPs) – devices that combine several functions in one unit – a printer, copier, scanner, telephone, fax and answering machine and sometimes a modem.
The operating principle of gsm signaling is that after firing any wireless motion sensor or door opening, and use a panic button activated a siren and immediately begin an alert via gsm channel by using sms (MMS) messages or phone calls to the owner or point guard. The user has the opportunity to record all messages, but with a special speaker to maintain direct feedback from the protected object. Consider some typical key system parameters GSM-alarm system. The first important parameter: gsm alarm system must be vandal, that is located in a secure metal case, where has all the elements, including – GSM-terminal block to connect cables, power supply. All this is necessary to perform the main functions of the system – the transfer of alarm sms or mms messages, and the inclusion of other devices. Well casing protects it from Snoopy.
The second option is that device must have no sufficient number of connectors for connecting various sensors signal. It is desirable that protected areas have been programmed – for example, the first connects to a chain of sensors movement, the second – the chain of Smoke detectors for the third – a reed switch on the front door, while the fourth – a chain of impact sensors. Also, do not interfere with some additional outputs for actuators (eg, light and reminders). The third parameter is characterized by the need to pay the availability and quality of the built-in power supply of special attention. After all, uninterruptible power supply and battery should provide a reliable the work of all elements of GSM-system (centralized and sensors connected to it) when a power failure for at least a day.
And what if the child in the car? Necessary to give the motorist a car seat sootetstvuyuschey age group! If this gift does not fit your budget – choose a beautiful child and to functional adapter harness. And if the car owner to the same breeder and – pay attention to safety belts Dogs and safety vests for four-legged friends. Surely such a gift and love the owner! Do not forget about the means to care for the car. Car treatment – these are different cleaners, polishes, Autoshampooes, air freshener, cleaner dashboard – gifts do not come cheap, but the car required for an appropriate and regular care. After all, one way or another, the motorist rather a lot of time behind the wheel. Gift for Motorist – it is also a functional thing.
Interest – interest, but the element of "usefulness" in the present – not less important. Present owner of the car radio cassette player or a modern, brand-new set of tools – obviously useful things. Or wireless mobile headset. Your friend has a? No? Give now! Take care of his safety. If the vehicle owner, planned a long trip soon, or in the nearest future well-deserved rest, then serve as a wonderful gift … the refrigerator.
But, of course, no home: the car with him to carry such a whopper … will not be easy. Compact, roomy and cool – choose Auto-refrigerators guided by these criteria. By the way, it is possible that the car – this is one means of recreation.