Looking through the catalogue of Conrad, I saw a very cheap black-and-white camera module and a plan was born. When it arrived I first tried it and although the resolution is limited, it is very sensitive. At night in the living room, it is working fine. Some of the colors are transformed but what the hack. For my use this module is not perfect but see it as an experiment.
Next thing is to take some design steps. Wireless or cable: I had the big real of twisted-pair-shielded-cable, used in professional telephone exchanges. Because I had 3 wires (including the shield) it was possible to keep the power system on the ground.
The wires are:shield = +power, pair1 = video pair2 = ground. I put the positive power on purpose on the shield so the twisted-pair can be used for the video signal. (video signal and ground are now twisted, which reduces the noise). The setup now is with 20 meters of cable and there is no visible noise. So maybe I will extent the cable to 30 meter.
To keep rain and dust out, I placed the electronics in the original package material in which the module was delivered. The system will be placed in the kiteline. To aim the camera I design a system with a yellow ball. The white things on both sites of the ball are door-stoppers. I bought them for my water-rocket experiment but that didn't work out. Here they are perfect. With the wing-screw (dutch: vleugelmoer) it is easy to prevent unauthorized movements of the camera.
The result is not very good as you can see. The resolution is too poor. I am thinking of buying an other module, probably the colored one, which is more expensive. But the testing was successful. The most important issue was to find out if the length of the cable was a problem and that was OK. The movie was taken from HSS (Huizer Surf Standje, the small beach near Huizen in Holland. You can see the 2nd toilet building with all the locals)