In case you did not know, each radio control helicopters video transmission equipments, basically consists of a camera and video transmitter, and a receiver.
Most radio control helicopters video transmission are quite interesting. They have a specific transmitter, which is installed and connected to a receiver- complementing and in some cases replacing earlier. On the plane are complementary attachments camera servos (vertical and horizontal), the altimeter and the OSD with all its added features to be cited at the end, because in a first plane is not an element normally used.
On land, the most common additions are directional antennas, virtual vision goggles, the recording equipment and a device known as head tracking, which consists of two gyroscopes servos connected to the radio control helicopters chamber through two channels of the station, and synchronize the movement of the head with the camera, giving an impression of realistic virtual immersion.
The camera
The cameras are known as FPV. CCD sensor have ¼ or 1 / 3 of an inch, a resolution of between 380 and 520 lines and a slim line optical, but must have an opening of at least 60-70 degrees. These are otherwise entirely normal. To avoid errors, try not to use: CMOS sensors since they are undesirable, cheaper, and pinhole optics, the former because they are very sensitive to glare, and the latter because they have no light, and can maintain 100 % vision with a single drop of rain. The consequences can be catastrophic in both cases.
The video transmitter
The radio control helicopters transmission of the signal recorded by the TV is in two basic frequencies: 2.4GHz and 900MHz. The most common is the first, and is chosen mainly because the spectrum is far from that used for the control unit, which in Spain is 35 MHz, and because there are many sales teams this often, because it is used in transmission of wireless computers. This is also its main drawback, but we will not dwell here on this.
There are different transmitter’s emission powers, but in general the most widely used range between 500mW and 1000mW. With less power there is a limited scope and with more power there is interference between transmission equipment and receiver of radio control helicopters.
These two receivers are connected to the station free, are ordinary servos, and art is to make a craft assembly, because although there are business models are generally for other types of cameras heavier than those used by us. We must take care to choose radio control helicopters servos that are not noisy or aspen, and appropriate to the effort made.
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