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Micro helicopter wireless cam
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making the main body
making the cyclic control system
an introduction to electronic components building an airborne video system
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There are many articles about installing wireless cam on the RC gas helicopter (eg.RC-CAM). It is really very interesting as you can experience what your helicopter do! However, for an indoor helicopter, the equipment for such system would be too heavy to be carried for a tiny indoor helicopter. However, as the development of the technology, the wireless cam that with transmitter built-in is placed on the market.
The wireless color cam in the above photo is only about 9g ( after the removal of the heavy battery connector ). that's all for me to put on the helicopter:
I have found several model of these wireless color cam in the internet. Maybe you would like to take a look:
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I finally buy one from a local electronic shop which offer a much more valuable price. here is what I had bought:
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I was so disappointed to realize that the approach of using the same power source for the helicopter and the cam didn't work. This is because interference occurred when the tail motor or the main motor starting turning. However, when I power the cam with another battery pack and place the cam near the running motors, the video received remain clear. The problem is how can my tiny helicopter afford to one more battery pack which is about 100g? the solution is:
The batteries below the AAA battery pack is the high voltage alkaline battery ( 12V ). The left one is GP23A ( E10*28mm ~6g ) while the right one is GP27A ( E7.7*28mm ~4g ). Since the power consumption of the wireless cam is only 50mV. It is possible to power up it by these tiny, light battery. By using this separated battery, no any interference occurred.
For the sake of weight, wires are directly soldered on the battery. So, all the components needed to be added on the helicopter are:
From the above photos, you can see the cam is attached on the elevator servo. The video captured is not very clear as the platform for the cam vibrate quite a lot after the helicopter has taken off. The video has been placed at the video page which is only 3.89MB. This system haven't been tested outdoor cause I got nothing to capture the video received by the receiver except the video card on my desktop computer.
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| Here is the technical data of the cam: | |||
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size of the cam: 1.8 * 1.8 * 1.7 ( cm ) weight of the cam without the battery connector: ~9g size of the receiver: 11.5 * 8 * 2 ( cm ) Frequency: 1.2GHZ + 0.2% Electric power: DC9V Power consuming current: 50mA Suitable environmental temperature: -20oC ~ +60oC |
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total ~15g
