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Thread: Low power consumption 24/7 video recorder?

  1. #91
    Maximum Bitrate tempgp's Avatar
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    for not car related deployment we only use quads to split monitors... zoom feature is the same a digital zoom, it just zooms the bizels closer to you, camera quolity has low affect if you have low resolution.... good military cams will have no flikering at night which makes them clear... lenses play big role... i have some samle pix from diferent lenses and u see extreme diference on them... if some one needs i can find and post those pix
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  2. #92
    Maximum Bitrate tempgp's Avatar
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    boom boom lol
    I do cameras for leavng =) damn how could i miss spell that word (time to get to speel....daa sleep, fingers are out of sync)
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  3. #93
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    Hello. I also want to get a surveillance system for my car, I've been wanting it for a while, and today someone deflated one of my tires (edit: afterall, someone slashed one of my tires, but it was a small cut, so it took long to deflate), so I want to get it asap.

    What I'm thinking of, would be a 4camera recording by motion sensing, even when car is not on. Motion sensing would reduce the recording time, so it would save power.
    I've also been looking through ebay for a while, and today I found this:

    http://cgi.ebay.com/Car-Mobile-4CH-M...item5880a43af3


    It can take a hard disk of up to 500gb, and has 120fps (30fps per camara). My only question is if the battery would hold up something like this.


    What do you think?

    Regards

  4. #94
    Maximum Bitrate tempgp's Avatar
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    that one is in-drive simplex mobile dvr.... it is designed to record video while u drive, like in school busses and police cars. We had few of them but even didnt bother to open the box =) I think power usahe is like 40-50W + each camera eats about ~5W (numbers out of my memory you need to look at device specks) so full load 70W thats too much for battery when its off. Well you cam leave few hour but then buttery is out

    Also motion detection will not save you power as in order to detect it you need to record and porocess it. it only saves space.

    Thas my take on this class of DVRs
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  5. #95
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    Best bet is to wire up a secondary alarm, or alarm type device, that will be used with a motion or sensitive microwave sensor to turn the recording equipment on. I'm sure one could wire in a microwave sensor that will trigger on a recording system or a pc that runs dvr software. Alarms themselves, even cheap ones, can have a trigger output to turn on other devices for a set amount of time.

    There are no good recorders out-of-the-box for this. I WAS going to wire cameras up to my alarm some 5 years ago but the recording device was a big issue. The flash devices that are the most appropriate only record in horrible 10 second clips. A CarPC with decent cameras (read: NOT $20 surveillance cameras from the store) can be setup to do this all without draining the battery (have it stop if the power source drops below a certain voltage) while returning excellent quality video for actual use in court, or in the back alley...decent (imo) cameras and lenses can cost hundreds each for decent quality. Perhaps an old digital camera with a triggered shutter would be more appropriate and use less power? Expect the shutter to wear out though.

  6. #96
    Who am I? HiJackZX1's Avatar
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    The one listed previously is the best route to go. It uses 5V and leaves off on the last place when power is reapplied.
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  7. #97
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    Quote Originally Posted by HiJackZX1 View Post
    The one listed previously is the best route to go. It uses 5V and leaves off on the last place when power is reapplied.
    Where does it show 5v? The listing says 9v-32v and 5v would just be stupid on a system outputting 11-15v under normal circumstances. Anyways, the recorder isn't typically the problem, it's the cameras and trigger mechanism. Typical surveillance cameras are rated at 12v/500mA but that is often at full tilt with an auto iris. I have no clue what lenses with auto focusing will do. I still don't understand why cctv systems are still basically limited to 400-500 tvlines for the best price/performance while we've got 2TB hard drives and sub-$300 compact camcorders that do 1080P easily. If they were the size of a penny, it'd be fine but those type are only 200-300tvl and do horrible in low light.

    I wouldn't be surprised if a low quality camera will get you the action but not an ID on a person - you can typically have one or the other. You shoot for having an up-close where people have to go so that you may pick up their details and clothing, then an area view to see who wearing what does what. When I find parts that I like, I will have wide angles in the front/rear windows for liability sake and two aiming at the side doors.

    50w for the recorder is pushing it a bit - full carpc's can come in around that or lower. Dedicated recorders can draw less than 200mA at 12v, per camera. A dedicated 4 camera system may be around 30w at 12v, full load and recording to flash memory.

  8. #98
    Maximum Bitrate tempgp's Avatar
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    security cameras are bild to suit demand of the market -- cheap way to see the motion outside the walls. ID a person by CCTV forage is quite hard, and results of such id will rarely stand in court. For ID you most of the time use dedicated close up 570TVL camera on the lkevel of the eyes facin the door. In car that is impossible as you don't know where person will come from.

    HOWEVER: there are cameras called scientific that deliver outstanding quality and resolution and often high FPS (ex 60 fps). They run from $600 per camera + say 120 degree manual iris lens will cost you another $150. If you get monochrome camera you will be able to see all details but the color =)
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  9. #99
    Who am I? HiJackZX1's Avatar
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    Quote Originally Posted by Seek View Post
    Where does it show 5v? The listing says 9v-32v and 5v would just be stupid on a system outputting 11-15v under normal circumstances. Anyways, the recorder isn't typically the problem, it's the cameras and trigger mechanism. Typical surveillance cameras are rated at 12v/500mA but that is often at full tilt with an auto iris. I have no clue what lenses with auto focusing will do. I still don't understand why cctv systems are still basically limited to 400-500 tvlines for the best price/performance while we've got 2TB hard drives and sub-$300 compact camcorders that do 1080P easily. If they were the size of a penny, it'd be fine but those type are only 200-300tvl and do horrible in low light.

    I wouldn't be surprised if a low quality camera will get you the action but not an ID on a person - you can typically have one or the other. You shoot for having an up-close where people have to go so that you may pick up their details and clothing, then an area view to see who wearing what does what. When I find parts that I like, I will have wide angles in the front/rear windows for liability sake and two aiming at the side doors.

    50w for the recorder is pushing it a bit - full carpc's can come in around that or lower. Dedicated recorders can draw less than 200mA at 12v, per camera. A dedicated 4 camera system may be around 30w at 12v, full load and recording to flash memory.
    Here is a link to the DVR, incase we are talking about different units. http://www.gizmofocus.com/servlet/th...ini-DVR/Detail

    As you can see, it says AC 5V DC for the adapter. I think its 5V @ 2 amps. The cameras are 12V @ 1 amp. U'd be surprised though, my rear cam, I can actually see into the persons front window. I can see them talking on the phone which was my #1 reason. If someone rear ends me, I have proof that the b!+ch was talking away. Now I already have my camera system in place, just no DVR yet. My rear cam is wide angle, and it gets about three car lanes of image. The side cams will also get 3 lanes also, but I am aiming them to get the side of the car also, this will help to determine where cars are in proportion to my car. The image isnt exact since we are use to seeing it magnified in mirrors. Most of you wont be watching it though, just recording. Me on the other hand, my mirrors are being replaced 100% with cameras. The
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  10. #100
    Maximum Bitrate tempgp's Avatar
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    HiJackZX1, try to remove IR filer in the cam and replace it with exposed (or unexposed) processed camera film =) You can see even through tinted windows of the other car.
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