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Thread: Low power consumption 24/7 video recorder?

  1. #11
    Constant Bitrate kwchan's Avatar
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    looking at something that can record in DIVX @ 30fps, preferably support >4GB SD card

    The DVS can only record 8fps in AVI format

  2. #12
    FLAC
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    Well, I couldnt find any better system that would meet my needs of low power consumption and automatic loop recording. So I just pulled the trigger and bought the sd dvr:
    http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN:IT&ih=012

    and a cctv camera (I hope those are real ir leds):

    http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN:IT&ih=018

    Also bought some lm317 voltage regulators so that I can hook them up in the car. Total cost is just a little over $100CAD. The whole system should draw under 5 watts and will be run from my auxiliary deep cycle battery. Although having a high frame rate would be great, I think I will just set the system to automatically take pictures when there is motion. Hope this works.

  3. #13
    Constant Bitrate kwchan's Avatar
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    great...can post some sample video once u got it?

  4. #14
    FLAC
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    Sure, if I remember. It's shipping from China...so will probably take a while.

  5. #15
    FLAC
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    I was wondering if any electronic gurus would have a good recommendation to efficiently regulate the voltage from 12v to 9v and 5v to power the recorder and camera. I am most familiar with the lm317 chip, but that seems to dissipate the extra voltage as heat. I would prefer something as efficient as possible. Every watt counts, as I am running on battery.

  6. #16
    FLAC
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    Not sure how efficient your chips are but these guys are designed for decent efficiency.
    http://www.hvwtech.com/products_view.asp?ProductID=585
    company is also located in calgary as well.

  7. #17
    FLAC
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    Thanks for the info, thats exactly what I am looking for. Although I will probably try eBay for some cheaper adjustable switching type regulators.

  8. #18
    FLAC
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    Ok everything just came in, so I thought Id give a update and share some footage to demonstrate this setup.

    Dont have time to install it in the car yet, so I just slowly swept the camera around my computer area. The device can be setup for motion detection and record video or take pictures. I have attached to this post what it looks like with the cheap eBay camera attached. Ive attached both captures in video mode and picture mode.

    I also wanted to measure the power consumption, but it maxed out my multimeter. So I attached a 1ohm resistor inline, measured the voltage drop, and calculated that the camera + dvr consumes about 3.1W @ 12V.
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  9. #19
    FLAC
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    I definitely think perhaps my cheap camera is the limiting factor for this setup. I have hooked the device directly to a cable box, and you can see the quality is noticeably better. I have attached the video and pictures of when the input is from a cable box. Although I can set it to record at 30fps, right now its set at 5fps to save memory.

    If anyone has suggestions on how to improve this setup, comments are welcome.
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  10. #20
    Variable Bitrate
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    It does seem much better with the cable setup vs. the camera. Even still, I don't think the camera is horrible. Much better than any security footage I've seen.

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