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CCTV power help (confused?) Answered

Hello

Im a newbie to this forum and electronics. I have a question for you clever guys.

I have a mini cctv similar to this:
http://cgi.ebay.co.uk/screw-WIRED-mini-COLOR-CCTV-SECURITY-SURVEILLANCE-CAMER_W0QQitemZ160098476341QQcategoryZ48632QQrdZ1QQcmdZViewItem

Now my problem is, the wire coming out of the camera has been cut and there is no adapter of any sort at the other end.

How can i power it up with the mains (i have a suitable mains adapter)? I mean can i simply join the ends of the wires and plug it in to the mains?

THANK YOU!!

***********EDIT***************

I hooked this up to a 9V power supply and tested it but didnt get a picture. I know why, the cam is 1.2GHz and the receiver is 2.4GHZ!! AAAGH!

How can I go about getting this fixed?? I don't mind if it is a wired or wireless solution

Discussions

0
user
uuili

11 years ago

it is the power cord because it is a wireless cam. Im just worried i might kill myself when plugging it in to the mains! LOL By the way are there any projects that i can use the cam for?? thanks

You say you have a "suitable mains adapter." If the adapter has two seperate wires, one will have a line or grooving on the edge. Identify this as Negitive. The other wire is positive. Now, if the wire is coaxial (one wire within the other) the center wire is positive and the "shield" or outside strands are negitive. Note that this is normally the case. In rare cases, especially with no-name budget components, the wires may be reversed. If you match positive to positive, negitive to negitive and the adapter is the correct voltage and sufficiant current, you should be safe.

Thanks Las Vegas. Before I hack the adapter, I have noticed there are 3 wires coming out of the cam (red, white and black). What is the white wire for? The voltage on the cam is 8V, can a smaller output voltage be used with this (eg 5V)? THANK YOU for all your help

Hmmm.... 3 wires... That's a problem. Without knowing what the purpose of the extra wire is, it would be dificult. Perhaps the camera and the transmitter require difference and/or isolated power. Check to see if the back cover can be pried from the back of the unit to determine the destination of each wire...

The red and black wires go into a circuit board. the white wire does not go into the circuit board, but in a sealed 'packet' where the antenna appears to come out of.

31032007(001).jpg

Gosh! I wish your camera had a better Macro setting. I can't make much out from the photo. Based on your description though, I'd say the camera is powered through the red (+) and black (-) wires. The white wire, I expect should be connected to Earth ground; Not the neutral line of the mains, but the Ground line (normally green).

LOL I have a very poor camera sorry. The cam is so small that you can just about see detail with the naked eye so a digi cam has no chance. So do you have any ideas on how I can get this thing working? Thank for all your replies

My instructions above should get the camera transmitting. As to recieving, you'll need a compatible reciever.

is there any wiring mod that i can do to attach AV leads direct to the monitor?

I've done a little research and it appears that this is just not going to work for you this way. It appears that there is a seperate transmitter unit that the camera plugs into. So, the power is being sent through the same wires the video signal is being recieved and the antenna wire (white) is getting it's signal from the box.

That's my impression of it anyway. This is the device I was looking at:

MINI PINHOLE WIRELESS SPY HIDDEN SCREW CAMERA W/ TV BOX

Looks like it is set for the bin then :( thanks for all your help las vegas

What I would do is study the circuit-board and try to draw up a schematic based on it. This would explain how power is supplied and how video data is sent. It's a very good bet that the video is handled as composite (either 25fps/50Hz or 29.98fps/60Hz). If so than the unit could be used to capture video directly through a TV monitor or VCR. It would require a simple circuit to pull the video signal off of the power wire.

WOW. Don't have a clue what 25fps/50Hz or 29.98fps/60Hz means but will certainly give the schematic a try

Frames Per Second and Hertz (frequency). The first is PAL (Europe) and the second is NTSC (North America/Japan). Elsewhere in the world, I'm not sure what's used. Normally it depends on what your Mains (wall outlet) frequency is.

A schematic is quite impoosible becuase the circuit is tiny and i dont understand what anything means. Here is a lousy pic with my bottom grade camera. the red and black wires go into the circuit board. These are the wires I used to power my cam using the mains. The white wire goes into a 'sealed package' from which the antenna comes out of. I think most of these wireless pinhole cameras have the same circuit but some work on deifferent frequencies, however I cant find any circuit diagram on the net. Maybe i am not looking in the right places? (scroll down)

Thats a good idea, but the cam is not weatherproof. And we don't live in an appropriate area :( Any other suggestions?

0
user
uuili

11 years ago

A schematic is quite impoosible becuase the circuit is tiny and i dont understand what anything means. Here is a lousy pic with my bottom grade camera. the red and black wires go into the circuit board. These are the wires I used to power my cam using the mains. The white wire goes into a 'sealed package' from which the antenna comes out of. I think most of these wireless pinhole cameras have the same circuit but some work on deifferent frequencies, however I cant find any circuit diagram on the net. Maybe i am not looking in the right places?

01042007.jpg

is it the power cord or the video output cord?...if its the power cord just find out the voltage that it takes and attach it to a cell phone charger or something similar of the same voltage...remember red to red and black to black simple enough