JIMI Electronic

Altimeter The elevation or altitude calculated by a GPS receiver from satellite data isn’t very accurate. Because of this, some GPS units have altimeters, which provide the elevation, ascent/descent rates, change in elevation over distance or time, and the change of barometric pressure over time. (The rough-and-ready rule is that if barometric pressure is falling, bad weather is on the way; if it’s rising, clear weather is coming.) Calibrated and used correctly, barometric altimeters can be accurate within 10 feet of the actual elevation. Knowing your altitude is useful if you have something to reference it to, such as a topographic map. Altimeters are useful for hiking or in the mountains. On Personal GPS Tracker with an electronic altimeter/barometer, calibrating the altimeter to ensure accuracy is important. To do so, visit a physical location with a known elevation and enter the elevation according to the directions in your user’s guide. Airports are good places to calibrat...

If you use a GPS receiver for your outdoor workouts, one of your biggest decisions will be how to carry the GPS receiver. The simplest way is just to hold it in your hand, if it’s free. Of the number of other different ways to carry a GPS receiver, the best carry methods will Provide optimal GPS satellite signal reception: Where you work out might dictate how you carry your GPS receiver. If you live on the plains (flat) without any trees and have excellent satellite reception, you have more options than in the Pacific Northwest (heavy tree canopies). Be comfortable : Carrying a GPS receiver should not distract you from your workout. However you carry it, it should be comfortable, and you really shouldn’t notice carrying or wearing it. Here are some different ways to carry a GPS receiver while working out. How you carry a GPS receiver usually ends up being a personal preference. Try a few of these methods to see which one works best for you. Armbands Armbands, especially w...

Many organizations believe that the Wireless Security Cameras often are not well suited to maintain the entire system because many contractors do not employ adequate IT-trained service technicians. That will change. At the same time, many IT service organizations are discovering that they can install and service IT-based security systems. Some of these organizations are rushing in to fill the void. IT-based integrated security systems must be maintained by a group that is competent in the maintenance of IT systems. That is often not the installing security contractor, whose competence is limited to the edge devices and software. I often recommend that maintenance of the IT infrastructure, operating systems, and software be placed under the authority of the organization’s IT department. Many TCP/IP-based security systems are installed without encryption or any other type of network security. I am fascinated by a security industry that does not secure its own systems. This could be...

A new architecture for alarm/access control systems begin to emerge in the near future. Unlike existing alarm/access control system architectures that wire a number of field devices from doors and alarms back to a closet where there is an alarm/access control panel, expect to see a new architecture in which each door may be served by its own individual controller, locally at the door. This has taken place. This allows for the connection of one or two card readers, door position switch, request-to-exit device, low-power door lock, one or two digital cameras, and a digital intercom (on Ethernet connections) all on the microcontroller. Digital integrated Wireless Security Camera System often interface to legacy analog systems. Legacy access card technologies present a simple challenge. TWIC cards are a good way to migrate from older cards to newer ones. Interfacing multiple access control systems requires an alarm management system that can receive signals from multiple other system...

Bluetooth is designed as a replacement for cables: that is, to get rid of that huge tangle of cables that link your mouse, printer, monitor, scanner, and other devices on your desk and around your home. In fact, the first Bluetooth device was a Bluetooth headset, which eliminated that annoying cable to the telephone that got in the way of typing. Many new cars are also outfitted with Rearview Mirror Monitor so that you can use your cellphone in your car, with your car’s stereo speakers and an onboard microphone serving as your hands-free capability. Pretty neat, huh? Like Wi-Fi, Bluetooth can offer wireless access to LANs, including Internet access. Bluetooth devices can potentially access the Public Switched Telephone Network and mobile telephone networks. Bluetooth is able to thrive alongside Wi-Fi by making possible such innovative solutions as a hands-free mobile phone headset, print-to-fax, and automatic PDA, laptop, and cellphone/address book synchronization. Communication ...

The heightened awareness for security has given rise to a more consumerfriendly grade of video monitoring gear for your wireless network — this stuff used to be the exclusive domain of security installers. You can get Wireless Security Camera System that contain their own integrated Web servers, which eliminates the need to connect a camera directly to your computer. After installation, you can use the camera’s assigned Internet Protocol (IP) address on your network to gain access to the camera, view live streaming video, and make necessary changes to camera settings. Network cameras are much more expensive than cameras you attach to your PC via a USB connection because they need to contain many of the elements of a PC to maintain that network connection. Expect to pay from $100 to more than $1,000 for network cameras; the more expensive versions offer pan-tiltzoom capabilities and extra features such as two-way audio, digital zoom, and motion detection. (The average price for a ...

GPS for paddlers and rowers For athletes who row or paddle for fitness or in competitions, a Personal GPS Tracking Device provides a quick and easy way to gauge distance and speed without installing a speedometer in your boat; they’re also cheaper than venturi speedometers. I’ve seen GPS receiver cases mounted to canoes, kayaks, and rowing shells using Velcro, duct tape, webbing, and custom-made fiberglass holders, all optimally placed to let the athlete read the screen and click buttons. Obviously, make sure that your GPS receiver stays dry. Your GPS receiver should have an IPX 7 rating (submersible for 30 minutes in one meter of water). Regardless of the rating, I use a waterproof bag. Voyageur bags, priced under $25, are durable, watertight, and buoyant; it’s easy to see the screen and use the receiver while it’s in the bag.  If you’re using a GPS receiver in any type of watercraft, tether the GPS receiver (or its case or bag) to yourself or the boat. This is good insuranc...