Senin, 09 September 2013

Question regarding Home Security camera and wiring?

best home security camera system under $500 on Keyshark USB Hardware Keylogger - OzSpy
best home security camera system under $500 image



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.

how do i fix my ahdr16?




nuckles


my ahdr16-80 cctv dvr just stopped working....its plugged in and no power?


Answer
its a standalone DVR made by ademco that only does 60 frames per seconds.


Its an old DVR and needs to be replaces it cant be repaired and if it can its not worth it.

You will need to get a new one but the good news is they are much more affordable then they were 3-4 years ago and offer better image quality higher frames and allow you to connect remotely.

not to mention DVR now day are easy to use.

here is a post I did earler you may find it handy as you are probably looking for a new DVR.


If you are looking at CCTV equipment here is an earlier post.

These brand manufacturers also have a complete line of CCTV cameras and DVR for any application from residential to military and stand behind there warranties.

http://www.ascendentgroup.com (Recommend)
http://www.honeywell.com
www.pleco.com/
http://www.bosch.com


Ascendent Technology Group 's has a really good 4 camera package for around $500.00 and will sell direct if they don't have a dealer in your area.

http://ascendentdvr.com/cctvpackages/avpâ¦


Not all CCTV equipment is created equal, in fact there are many options that offer varying performance take cars for example. In the world of CCTV you can find the equivalent of a $2,000 golf cart and a $350,000 Ferrari and everything in between. Both have 4 wheels but that's where the similarities end, itâs under the hood that counts.

95% of all wireless cameras are compete junk and any wireless camera under $400 run on 1.2, 2.4GHZ or 5.8GHZ and wont offer encryption. This is bad for 2 reasons one the signal can easy be jammed, with a laptop you can actually hacked video feeds so a criminal can use it to spy and know a good time to target your business or home.

Just like any other consumer electronic in the end you get what you pay for. Most retailers and sellers make about a 40-80% profit margin, this is after costs like shipping and overhead. That means when you buy a product that costs $100.00 the manufacturer usually has only spent $30 to build it which simply means itâs not a good product and will probably have a working life of about 2 months. There is a reason these products are 1/10 of the price of good and reliable DVR brand names. The type of seller these products attract are online sellers (ebay) and will make profits margins as low as 3% which means they canât afford to offer good service or allow for RMAs (returns). Cheap products are like disposable razors they are NOT designed to last for a long time and you will end up replacing them every 2 months.

Now some products can be made cheaply like ipod cases, screen protectors, and other simple products with no moving parts or electronics. DVRs need to be good quality as they run 24/7 (20X more than the average electronic device) and process anywhere from 30-480 frames per second which in a year is over 15 billion images, and a good DVR should last 3-5 years.

A true DVR and camera require years of research and development to facilitate the seamless integration of both the hardware and software. DVRs are highly complex systems that must run 24/7, processing millions of images per day and are one of the few products that canât be made both well and cheaply. Cheap and inexpensive products like Q-see, X10, Swan, Lorex, and other low grade DVRâs and cameras sold by Tiger Direct, Newegg, radio shack Sams Club, are not used by any security professional and should only be used by hobbyists.

To be honest the products these stores sells are often compete garbage and are not used by anyone who has worked with CCTV or security products. I They are poor quality especially for IR cameras, due to low quality material, low S/N ratio, and low grade CCD image chips.

Also as far as night vision or IR cameras go most do not give good images in the dark. Many companies claim good night vision but there are only a handful of brands who give night vision over 30 feet out doors. normally if a cameras is rated 150 feet of IR it will give you ok images at 30 feet at night and good images at about 20 if rated for 60 feet you might get 15 indoors and will be useless outdoors.

Now one option for wireless is using commercial IP radios which are basically wireless routers on steroids and can offer distances up to 40km of wireless with military encryption, this is not a cheap solution but neither is digging a trench. using these radios not only give you a security infrastructure but also communications infrastructures as well for internet and other purposes (LAN network)

Good radio company
http://www.tranzeo.com/

now in order to use this wireless network to distribute video you need to buy IP cameras which are similar to IP cameras only they transmit video over networks instead of a cable.

The company I recommend for CCTV products is Ascendent Technology Group they have a large product line and offer better products then Pelco Honeywell and Bosch and are about %20 cheaper and in my opinion have the best IR outdoor ca




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