18-02-2016, 10:24 AM
pc laptop based security system using pic micro controller documentation
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pc laptop based security system seminar
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pc laptop based security system using pic micro controller documentation
18-02-2016, 02:08 PM
pc laptop based security system seminar
Serious home security doesn’t have to comprise a panic room, bodyguards with pile-driver arms, and a machine-gun emplacement on the front lawn. It’s the peace of mind often achieved by a simple awareness of what’s happening around you. For that, you really need nothing more than a camera—or three. Put one at the front door to see who’s knocking; install one in the baby’s room to keep an eye on little Cuthbert; and, if you’re having second thoughts about that nanny you hired, stash a secret one in the den.
If you’re like most folks today, you have at least one PC at home, as well as a laptop you use when you’re away. In this project, we’ll explain how to configure your cameras so you can monitor them online, as well as when you’re home. After all, what good is security if you can’t take it with you?
1. Consider wiring schemes (or not)
It’s likely that your camera or cameras will need to be positioned far from your PC, so you might assume that installing a wireless camera or cameras is the only way to go. Wireless models aren’t always the best choice, however. Wireless cams operate in the 2.5GHz band, and that’s a very busy place, with wireless computer gear, phones, microwave ovens, garage-door openers, and quite a few other cord-free gadgets jostling each other for the same bandwidth. Things tend to get crowded and slow on 2.5GHz, and that’s definitely not a good thing for a security camera engaged in activity as bandwidth-intensive as streaming video.
As an alternative, consider camera models that use power-line connectivity. These cams feature a receiver that plugs into an AC outlet and connects to your computer via a USB port. The camera also plugs into an AC outlet, and the camera and receiver communicate with each other over the existing power lines in your home. The advantage is that, in theory, you shouldn’t encounter any communication dead zones between the two. They should act as if wired directly together.
2. Choose your camera carefully
Several considerations apply here. Do you want an indoor camera or an outdoor model, or perhaps a stealthy one versus something that looks obvious? Beyond those choices, however, you have a further pair: What frame rate do you need the camera to be capable of, and do you want a camera that records both video and sound, or will video alone suffice?
When contemplating this project, we looked at camera systems from Logitech and Axis Communications. Logitech’s WiLife security cameras use power-line connectivity, do not record sound, and top out at 15 frames per second (fps). The Axis Communications gear can be connected directly to your network router, but it also uses wireless 802.11g Wi-Fi as an option. It will record sound and is rated at 30fps (although in practice it “feels” a couple of frames per second slower than that).
Based on those specifications, the wireless Axis 207w (indoor) and 211w (outdoor) cameras are more versatile. At $275 online for the 207w, that cam is also about $15 more expensive than the competing Logitech product, but not out of range for the extra features it offers. Unfortunately, the 207w was such a bear to set up—even though tech support assured us (during the hour or so we spent on the phone) that it typically works out of the box—that we opted for Logitech’s $299.99 WiLife Video Security Master System starter kit instead. It comes with one indoor camera; additional indoor and outdoor cams cost $229.99 each. (“Spy cams” are available too.) The WiLife cameras come with onboard processing hardware to boost their motion-detection abilities and image quality.
Serious home security doesn’t have to comprise a panic room, bodyguards with pile-driver arms, and a machine-gun emplacement on the front lawn. It’s the peace of mind often achieved by a simple awareness of what’s happening around you. For that, you really need nothing more than a camera—or three. Put one at the front door to see who’s knocking; install one in the baby’s room to keep an eye on little Cuthbert; and, if you’re having second thoughts about that nanny you hired, stash a secret one in the den.
If you’re like most folks today, you have at least one PC at home, as well as a laptop you use when you’re away. In this project, we’ll explain how to configure your cameras so you can monitor them online, as well as when you’re home. After all, what good is security if you can’t take it with you?
1. Consider wiring schemes (or not)
It’s likely that your camera or cameras will need to be positioned far from your PC, so you might assume that installing a wireless camera or cameras is the only way to go. Wireless models aren’t always the best choice, however. Wireless cams operate in the 2.5GHz band, and that’s a very busy place, with wireless computer gear, phones, microwave ovens, garage-door openers, and quite a few other cord-free gadgets jostling each other for the same bandwidth. Things tend to get crowded and slow on 2.5GHz, and that’s definitely not a good thing for a security camera engaged in activity as bandwidth-intensive as streaming video.
As an alternative, consider camera models that use power-line connectivity. These cams feature a receiver that plugs into an AC outlet and connects to your computer via a USB port. The camera also plugs into an AC outlet, and the camera and receiver communicate with each other over the existing power lines in your home. The advantage is that, in theory, you shouldn’t encounter any communication dead zones between the two. They should act as if wired directly together.
2. Choose your camera carefully
Several considerations apply here. Do you want an indoor camera or an outdoor model, or perhaps a stealthy one versus something that looks obvious? Beyond those choices, however, you have a further pair: What frame rate do you need the camera to be capable of, and do you want a camera that records both video and sound, or will video alone suffice?
When contemplating this project, we looked at camera systems from Logitech and Axis Communications. Logitech’s WiLife security cameras use power-line connectivity, do not record sound, and top out at 15 frames per second (fps). The Axis Communications gear can be connected directly to your network router, but it also uses wireless 802.11g Wi-Fi as an option. It will record sound and is rated at 30fps (although in practice it “feels” a couple of frames per second slower than that).
Based on those specifications, the wireless Axis 207w (indoor) and 211w (outdoor) cameras are more versatile. At $275 online for the 207w, that cam is also about $15 more expensive than the competing Logitech product, but not out of range for the extra features it offers. Unfortunately, the 207w was such a bear to set up—even though tech support assured us (during the hour or so we spent on the phone) that it typically works out of the box—that we opted for Logitech’s $299.99 WiLife Video Security Master System starter kit instead. It comes with one indoor camera; additional indoor and outdoor cams cost $229.99 each. (“Spy cams” are available too.) The WiLife cameras come with onboard processing hardware to boost their motion-detection abilities and image quality.
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