A ready-made set for video surveillance, consisting of a camera in a housing and a special monitor, is quite expensive. A miniature "semi-finished" board will help you assemble the camera yourself, and use a regular household TV as a monitor.
Instructions
Step 1
DIY boards for CCTV cameras are sold in the same stores as ready-made cameras designed for this purpose. They differ from each other by the presence of a backlight and a microphone, the type of image (color or black and white), and resolution. Buy a board that suits you.
Step 2
Use a small plastic box as a housing for your homemade camera. Make a hole in it along the diameter of the lens, as well as four mounting holes that match in location and diameter with the same holes on the board. Secure the latter with four screws, nuts and washers, and so that it does not break from pressing forces, use bushings of a suitable length, made from a plastic case from a fountain pen. If you have a microphone and LEDs, holes are required for them as well.
Step 3
In the same box, place a terminal block with three or four contacts (depending on whether the board has a microphone). Find out the correspondence of the colors of the wires to their purpose from the instructions for the board. Connect them to the terminal block on one side.
Step 4
Drill a hole in the box for cable entry. Use a two-wire power cord with colored wires to connect power to avoid polarity reversal. Connect the negative wire to the common wire of the board, and the positive wire to the one intended for supplying power. Use shielded cables for picture and sound signals (if equipped with a microphone). Connect their braids to the common wire, and the central cores to the corresponding wires of the board.
Step 5
Connect the power cord, observing the polarity, to the stabilized 12 V power supply, and the shielded cables to the RCA plugs. Connect them to the video and audio jacks on your TV. Only then plug in the power supply and the TV. At the last, select the video input to which the homemade camera is connected. Check its performance.
