L7805CV 5V Voltage Regulator to IP camera over POE

Discussion in 'The Projects Forum' started by StealthRT, Nov 13, 2012.

  1. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    Hey all i am having a problem with getting my IP cameras to work over my home-made POE cable.

    The parts i made in order to have POE are the following:
    - L7805CV 5V Voltage Regulator (for input to the IP Cameras 5v/ground pin. 12v -> 5v) link: http://www.ebay.com/itm/L7805CV-5V-Voltage-Regulator-1-5A-4-pack-/181019440315?pt=LH_DefaultDomain_0&hash=item2a259974bb

    -12V 2A DC Power Adapter Supply For CCTV Camera US (for use on the opposite side of the IP camera to inject into the ethernet cable) link: http://www.ebay.com/itm/12V-2A-DC-Power-Adapter-Supply-For-CCTV-Camera-US-/300725878185?pt=US_Surveillance_Cables_Adapters_Connectors&hash=item4604a8bda9

    - Night vision Waterproof Outdoor Wifi Wireless WIFI IP Camera IR 24 LED M-JPEG (The IP camera itself) link: http://www.ebay.com/itm/180810824039?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_sacat%3D0%26_from%3DR40%26_nkw%3D180810824039%26_rdc%3D1

    - Power over Ethernet PoE Adapter Injector + Splitter Kit (to hook up between the switch and the IP Camera) link: http://www.ebay.com/itm/160680383412?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

    - 1000Ft Direct Burial Waterproof Cat 5e Outdoor UTP CMX (used from the switch [garage] to the IP Cameras [outside]) link: http://www.ebay.com/itm/1000-Ft-Direct-Burial-Waterproof-Bulk-Cat-5e-Cable-Cat5e-Outdoor-UTP-CMX-Black-/110961200173?_trksid=p2047675.l2557&ssPageName=STRK:MEWAX:IT&nma=true&si=rfpxfDhHu%2B0ak2WPbv4FVmFJJIU%3D&orig_cvip=true&rt=nc

    Now the power supply that comes with it says this:
    I noticed when i hook up the original power supply to it-it does not power on.. I'm just guessing its because i have the 5V Voltage Regulator in there and its feeding it less than 5v?

    But once i connected it up using the POE injectors it works just fine (tested with a ethernet cable about 10ft long or so). Now that i placed them outside i have (again guessing) about ~120ft of ethernet cable from one tree IP Camera to my garage. It's using the direct burial ethernet cable for this (the original test was using a standard ethernet cable).

    The power is coming from the 12V 2A DC Power Adapter Supply hooked into the POE injector. From there the POE injector is hooked to the switch and the other end to the direct burial ethernet cable thats going outside to the IP Camera. At night i can see the glow of the red IR LEDS so i know its getting power. And i also see that its blinking (green led) on the switch so i know its communicating... But when i try to find its IP on my router it does not show up at all??

    And again, i tested this out using the 12V 2A DC Power Adapter Supply/ POE injector and a standard 10ft ethernet cable and it worked just fine.

    I tested the voltage with a volt meter to make sure it was getting enough from that long run. I had 12v on one side (the garage) going through the injector/ethernet wire and on the other end (outside at the other injector from the ethernet) i had about 12.4v constant so it really did not drop at all from that 150ft ethernet run.

    I also tested to make sure my crimping on the ends of the ethernet were correct (had a gizmo that sent out a signal and showed me what order the wires are in). They all came back the same :)

    So what all should i try testing out first? Second? Third? I already heat shrink all the connections outside so i hope i don't have to pull those apart to disconnect the POE/spitter!
     
    Last edited: Nov 13, 2012
  2. Doktor Jones

    Active Member

    Oct 5, 2011
    57
    1
    Sounds like you have a network problem, not a power problem. How are you determining the camera's IP address? From what I read on the eBay site, it looks like it uses DHCP, so it's probably just grabbed some random IP from your home network's router (assuming of course that you have a typical home/small business network setup).

    I might suggest looking at your router's DHCP lease table and looking for any unnamed entries -- try browsing to them in your web browser (i.e. if an entry shows up with the IP of 192.168.1.5, try http://192.168.1.5) until you find your camera. If you can't access the router's control panel, get your own computer's IP then run a port scan across that range (i.e. if your computer has an IP of 192.168.1.3, scan everything from 192.168.1.1 to 192.168.1.255) on port 80... the camera should come back with a response on port 80.
     
  3. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    I've looked at my routers settings and it has "Attached Devices" [NOT my routers image.. just a random one]
    [​IMG]
    But they do not show up on that no matter how many times i refresh the page. And again, when i was testing it out with a shorter ethernet cable, etc it DID show up in the list and i was able to log into it. It is DHCP.

    Could i be the way i crimped the ethernet cable? I ordered them from pin1-8:
    [Green|Green white|Orange|Orange white|Blue|Blue White|Brown|Brown White]
     
  4. Doktor Jones

    Active Member

    Oct 5, 2011
    57
    1
    That'd certainly be at least part of the problem. The usual standard is:

    (TIA-568b)
    OrangeWhite / Orange / GreenWhite / Blue / BlueWhite / Green / BrownWhite / Brown

    or

    (TIA-568a)
    GreenWhite / Green / OrangeWhite / Blue / BlueWhite / Orange / BrownWhite / Brown

    It doesn't so much matter which standard you use, as long as both ends are crimped the same and pins 1/2 are the same twisted pair, and pins 3/6 are the same twisted pair.

    Incidentally, a crossover cable (which I don't believe you need) has 568a on one end and 568b on the other.

    The reason for the twisting is to eliminate noise/crosstalk on each signal pair, and over a ~100 foot run if the wires aren't paired off correctly to achieve this, that's a lot of potential noise... so your switch is probably seeing something there which is why the light is blinking... but your router's not getting anything intelligible off the line, which is why the camera isn't getting an IP via DHCP.

    Simple solution: chop the ends and re-crimp. You left a little slack in the line right? ;)


    Also, I'd recommend hooking up the camera the way you had where you got it working, then log into the interface and assign the camera a static IP -- so you can just hit that IP directly and see if you get a response, rather than fiddling with DHCP. This way you'll also know where the camera is instead of having to check the DHCP lease table. Given that you've got a Netgear, the DHCP range is probably 192.168.1.2-192.168.1.100, so assigning it an address of 192.168.1.200 or thereabouts should keep it safely out of conflict with your router's DHCP server. You can do this for each camera, and just assign them subsequent addresses (192.168.1.201, 192.168.1.202, etc).
     
  5. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    Alright I'll just have to cut off both ends and do this again with that color schema.
     
  6. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    Yep that was the cause. Not putting it in the proper order! Thanks for the help!
     
Loading...