JIMI Electronic

I do a lot of running and biking, every now and then entering some pretty crazy endurance events like ultramarathons, Ironman triathlons, and adventure races. A GPS receiver can make a pretty good training partner: You can use it for lots of things besides helping you avoid getting lost. This Blog is for athletes who exercise outside in the fresh air (sorry, no gym tips) and want to know how to incorporate GPS receivers into their workouts. A Portable GPS not only helps you successfully get between Point A and Point B but is also handy for staying found. These tips apply to almost any sport: Measure distances over known courses : Instead of guessing the course or route length, you can use a GPS receiver to measure the distance with a fair amount of accuracy. Better understand the elevation of courses : Elevation data can give you a more accurate sense of how flat or hilly a course really is. Even if your GPS receiver doesn’t have a barometric altimeter (which is required for...

GPS Tracking Devices was designed to work outdoors. The signal from the GPS satellites is extremely weak, and the satellites are far away. The total radiated power from each satellite is just 27W, about the same power from a dim lightbulb. The satellites are more than 20,000-km high (about 55 times higher than the space shuttle flies). When the signal reaches the GPS receiver on the Earth, the received signal power is about 100 attowatts; “atto” means 10–18, and it is not a commonly used prefix. We typically express such low powers in terms of decibels. But it is useful to mention the attowatt just this once, to get a feel for how weak the received GPS signal really is. The received signal power is 100 attowatts when the receiver is outdoors; when the receiver moves indoors, the signals rapidly get weaker, by 10–100 times in a house,and by 100–1,000 times or more in a large building. However, it is not just indoors where GPS has signal problems; the weak signal is a problem outdoors...

There are dozens of different  Wireless Security Cameras , which has its advantages and its disadvantages.The greatest benefit is the ease with which developers, inventors, and innovators can create bigger, better, and more exciting solutions for the problems we encounter.The single biggest disadvantage is that all of these devices are now sharing a relatively small frequency space, causing collisions, intrusions, and signal distortion. Although we’ll be focusing strictly on wireless video, it’s important to understand the other devices that can interfere with testing. It’s not uncommon for someone to have a cordless phone near their computer or a Bluetooth headset for their cell phone, that tries to connect when a call comes in. Identifying possible sources of confusion up front will make your wireless video test much more successful. Before we look at ways of locating wireless video, let’s look at some of the products you might run into while you’re hard at work.   Vide...

Personal digital assistants (PDAs), such as a Pocket PC or Palm, are a popular way of accessing GPS information. The PDA processes satellite data from a  Portable GPS  and then displays your current location in a mapping program. You can use many different types of GPS receivers with PDAs, including handheld, mouse, wireless, and card. This chapter helps you navigate through the PDA/GPS maze by reviewing the different hardware and software options and comparing common, handheld GPS receivers with PDAs that use GPS. I start things off by discussing some of the advantages and disadvantages of PDA-based navigation systems Choosing between a GPS Receiver and a PDA.   You might wonder why anyone would you want to use a PDA instead of a handheld, consumer GPS receiver. That’s a very good question; you gadget junkies out there who have your hands raised and are answering, “Because it’s cool,” please put your hands down and continue reading. You’ll find compelling advantages...

One video monitoring application uses on-site local networks and a second application uses the Internet and  GSM Security camera  , signal routers, and servers for remote site video monitoring. Security applications require complete integration of communication, video, alarm, access control, and fire to provide monitoring by the local security force, and corporate executives at a local or remote site(s). The integration of these security functions provides the safety and security necessary to protect personnel and assets at any facility.   The clarity of the picture transmitted using fiber optics is now limited only by the camera, environment, and monitoring equipment. Fiber-optic systems can transmit signals from a  Wireless Security Cameras  to a monitor over great distances— typically several miles—with virtually no distortion or loss in picture resolution or detail. The system uses an electrical-to-optical signal converter/transmitter, a fiber cable fo...

GPS DEVICE HISTORY   The GPS is an acronym for global positioning system and is an American system that consists of a system of 24 geosynchronous satellites in the Earth’s orbit. In any place on Earth, three or four satellites should be in view of a  GPS Tracking Devices . GPS allows both people and machines to know their approximate or precise location at any time.Many people thought that the global positioning system was exclusively an American phenomenon that was a by-product of the 1960s space program. However, the history and changes have taken place in GPS are much more complicated than you think. Let’s see what the GPS history is.         Multi-environmental GPS tracking devices   In the early twenty-first century, it was possible to see various land-based GPS transponders sold by companies such as Ness Technologies that had magnetic mounts and allowed first responder agencies to track ambulances in real time. When vehicles are tracked, better d...