Trying to use only material I had around the house, I set off on a creating adventure!!
Step 1: Parts
One or two small wired surveillance cameras
(optional wireless surveillance camera)
2x Female rca jack (taken from an old camcorder or vcr…)
2x RCA Cable I am using the white and yellow
2x Trimmer pot (thin) from old radio
Perforated PC board
2x SPDT switch (one from hip gear screen other from old camcorder or radioshack…)
3x 9volt batteries + connectors
Material to act like a watch band (I used an old elastic strap from an ankle brace)
Soldering iron+ solder
Scarf, jacket, shirt to hide the first camera
Paintball gun or the like for the second gun, or wherever you want to put it
Step 2: Dismantling
Start with the two bottom ones that are at the hinge, one will be under the white "Q. C. Passed" sticker.
From there go ahead and remover the remaining 4 screws and take off the monitor's back cover.
There are now 2 screws on the board for the monitor and under that 3 for the control board for the screen brightness, contrast and color as well as volume.
Remove everything from the inside of the case and put it aside, now separate the monitor case from the rest of the controller. We will only be using the monitor case for this project.
After everything is taken out you can now clearly see the two boards, the screen and the two speakers. I don't need sound so we can clip the speakers off and remove them from the case two. I trimmed down the area the held the speakers in so that it was level.
Step 3: Wiring the Boards
Using a schematic (http://i18.photobucket.com/albums/b134/Segasonicfan/hipgearpinout.jpg) I found on the benheck.com forums from segasonicfan I was able to figure out each wire and from that feel free to cut off the image control board and wire mine own so that every thing could be quite smaller.
Using two thin trimmer pots from an old radio (volume and frequency control) and the 4 resistors from the original image control board I was able to make a much smaller one that controlled just brightness and contrast. The default color was fine but the brightness was too bright and the contrast was odd. following the pinout from the board I replicated it on the new PC board.
Step 4: Video Input Switch
Normally you would use a DPDT switch but the one I had was too big for the project so I made the equivalent of one out of two SPDT switches.
You connect the outer shell pin (ground) of the first RCA female jack to the top right pin on the switch and the inner pin (+) to the upper left pin on the switch and then for the second RCA jack the outer pin to the lowest right pin and then the inner pin on the jack to the lowest left pin on the switch. the right and left middle pins on the switch are used to transmit the signal to the screen. The right one is for the ground and the left one is for the positive voltage on the board. This switch makes it so that the screen will show camera 1 when the switch is up and camera two when the switch is down. Because I used two SPDT switches I need to flip two switches instead of one is all.
Step 5: Placement and Battery
Hot glue the screen in first and then the video switch so that the monitor board will fit properly. A 9volt battery should fit snugly in over the old speaker spot.
I wanted two switches for the monitor to turn on, one momentary switch in the palm of my hand and another on/off switch that would stay on in case I needed my left hand but needed the screen to stay on. I used another SPDT switch and wired it in after the battery but before the momentary switch to bypass it if needed.
For the bottom half of the case I needed to cut some slits to insert a wrist band so that I could actually wears this. Again using a Dremel I cut two slits on either side and inserted the wristband from an old ankle brace.