Senin, 17 Februari 2014

Wireless Home Security Surveillance Camera system?




praveen


Hello,
For my house, i want to buy a wireless camera security surveillance system. Obviously, there are too many options. Can someone give me a feedback on any preferred brand or any feedback on what I should be looking for while buying this costly system? One potential option I found so far is
Swann SWDVK-825508 8-Channel Digital Video Recorder with Smartphone Viewing and 8 x PRO-550 Cameras
by Swann



Answer
For consumer grade systems, Swann and Lorex make fine equipment. I installed a Swann 8 channel (using only 4 cameras - but planning to add 4 more cameras later). The included/free SmartPhone app for remote viewing works well but can use lots of battery power as it is a stream of video over wifi. The included 8 cameras in the system you listed don't have a very far night vision "throw" (about 10 feet). Another option to consider is this 4-camera, 8 channel DVR kit
http://www.swann.com/s/products/view/?product=1530
plus four of these:
http://www.swann.com/s/products/view/?product=1144
Any camera with a composite video feed will work including those from Lorex, Q-See and others.

Consider adding a VGA monitor or TV (I use the "extra" video inputs on 4 TVs located in different rooms of the house so visibility is not so limited to a single place).

The system you linked us to is not a "wireless" system. The connection between the cameras and the DVR is a wired connection. The cable connecting these items has a connector for the video; a connector for power and a connector for limited pan/tilt/zoom control. (The zoom is the part that actually works - you would need a pan/tilt head in order for that capability to work and the zoom is digital zoom - not optical zoom). Keep this in mind: A single cable with multiple connectors connects the camera to the DVR and power.

In a wireless video system, the camera needs power (wire #1). The video is sent to a base station wirelessly. The base station connects to the DVR (wire #2) and power (wire #3). A "wireless" security camera uses more wires than a wireless system.
http://www.swann.com/s/products/view/?product=1028

The only thing "wireless" about the DVR kit in the link you provided us is that when the DVR is added to the computer network at your house, that wifi signal sending video to a smartphone or Windows computer is wireless.

Another option is to use IP network based security cameras but a dedicated computer (rather than a standalone DVR) is needed to be recording the video. These cameras tend to be a bit more expensive, especially it they are outdoor rated. And they need local camera power, too - so not exactly "wireless" either. Because they become a node of the local house's computer (IP) network, the complexity moves from the analog camera cabling to computer network implementation.

In either case, making the video stream available to a computer or a smartphone - locally or remotely - requires a decent knowledge of computer network configuration (especially if the computer network is to be secure).

Question regarding Home Security camera and wiring?




jd_tx


I've run cat5 cable throughout the house, which i thought I could use to connect security cameras. I don't need anything fancy (no recording) i just want to be able to use a switcher with a couple of cameras to view who's at the front door from my TV.

My question is, can cat5 cable handle what the cables that run video/audio/power to the camera handle? Mostly worried about the power.
I don't have power at the camera locations, so I need cameras that can run power through the connecting cable from the switcher. I would like to splice the cable that comes with these cameras and solder the ends to my prewired cat5 cable. I'm just woried that the cat5 cable wont be able to handle the power.... any input is appreciated.
(I don't want wireless cameras and am not looking for high end stuff just a basic system)



Answer
http://www.radiolocman.com/electrical-engineering/circuit-cache.html?di=18899
This is a very handy place for figuring what size wire can handle what amount of current depending on frequency of signal being sent. If your cameras are analog they could need a couple of amps. Basically a CAT5 cable uses 24 gauge solid core wire. I have run 2 Amps across them with no problem, but the current vs wire gauge table puts 24 ga at 1.4 Amps rating. If the camera is digital, then you shouldn't have a problem as most I have seen use about 500 milli amps to run, including infrared cameras.

Knowing the specific camera you have in mind, look up the power requirements, and if the power needs are under 1.4 Amps. I'd say you could at least try it. I personally like to double my wire gauge for current requirements. Safety factor of 2 is best. Good luck.




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