parametragemicroemetteur
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parametragemicroemetteur [19/08/2015 22:42] – modification externe 127.0.0.1 | parametragemicroemetteur [05/01/2022 17:30] (Version actuelle) – wikiadmin | ||
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+ | {{http:// | ||
+ | This ultra small and lightweight transmitter has outstanding performance. With a sensitive receiver, when used in conjunction with an 8dBi Patch antenna, it can work up to 1.5 km! | ||
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+ | For reference: a model airplane with a wingspan of one meter, flying at 600 meters looks like a dot from the ground. The transmitter has 4 bare wires which can easily be connected to your camera and power supply. | ||
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+ | {{http:// | ||
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+ | __Audio/ | ||
+ | * 1.9 gr, 18 x 17 mm | ||
+ | * 2.4GHz range, 16 different transmitting frequencies | ||
+ | * 10mW average output RF power | ||
+ | * 5V operation | ||
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+ | __Channel selection :__ | ||
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+ | {{http:// | ||
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+ | How to set channels with solder joints, X mean solder joint to ground | ||
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+ | ^A^B^C^D^Fréq.^ | ||
+ | |X|X|X|X|2.410 | ||
+ | |X|X|X|.|2.411| | ||
+ | |X|X|.|X|2.408| | ||
+ | |X|X|.|.|2.414 CH1 Airwaves (default)| | ||
+ | |X| |X|X|2.450 CH3 Lawmate et Airwaves| | ||
+ | |X|.|X|.|2.453| | ||
+ | |X|.|.|X|2.448| | ||
+ | |X|.|.|.|2.450| | ||
+ | |.|X|X|X|2.430 CH2 Lawmate| | ||
+ | |.|X|X|.|2.433| | ||
+ | |.|X|.|X|2.428| | ||
+ | |.|X|.|.|2.432 CH2 Airwaves| | ||
+ | |.|.|X|X|2.470 CH4 Lawmate| | ||
+ | |.|.|X|.|2.473| | ||
+ | |.|.|.|X|2.468| | ||
+ | |.|.|.|.|2.468| | ||
+ | |||
+ | ------ | ||
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+ | With the popular Lawmate and Airwave transmitter modules that are sold by various vendors it is relatively easy to get a FPV camera setup up and running. Unfortunately these regularly use a cased KX-131 camera and a 500mW 2.4GHz transmitter, | ||
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+ | For smaller planes, or those trying to save as much weight as possible, this poses a bit of challenge. However in my quest to find exactly such a solution I came across a miniature 10mW 2.4GHz Tx sold by Rangevideo (http:// | ||
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+ | In order to save as much weight as possible it makes sense to use an uncased KX-131, which not only shaves about 10-grams off of the weight of the cased version, but also can be powered off of 5V directly, a voltage which we have available in any RC plane already. The Tx itself is also running off of 5V hence we tackled our power requirement issues in one fell swoop. Below you'll find the uncased KX-131 camera and 10mW Tx pictured. I already attached a lead with a JST plug that plugs directly into a spare channel on your receiver. | ||
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+ | Uncased KX-131 and miniature 10mW 2.4GHz Tx | ||
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+ | {{http:// | ||
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+ | I've opted to glue the miniature Tx to the back of the KX-131 camera directly using 5-min epoxy, but obviously it needs to be shrink wrapped prior to doing so, else we might get shorts or worse. I use the same type of shrink wrap that's used with battery packs, this is very thin, light and durable. An added benefit is that it mechnically strengthens the wires coming from the Tx and provides a surface for the glue to adhere to. Also, if you ever need to remove the miniature Tx you only have to cut the shrink wrap to gain access to it. I opted to remove the connector header on the KX-131 and solder the wires onto the PCB directly. | ||
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+ | Miniature 10mW 2.4GHz Tx shrink wrapped and connected to KX-131 | ||
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+ | {{http:// | ||
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+ | KX-131 camera and miniature 10mW 2.4GHz Tx glued together | ||
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+ | {{http:// | ||
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+ | Now we need to make a stable base for the KX-131 camera and the miniature Tx to be attached to. I often use L-shaped ABS plastic strip for these kind of things, as it is light, durable and can easily be drilled, milled, sanded or cut to size. I cut a length of black ABS strip to the right size, drilled an 8-mm hole in the bottom and milled a 3-mm slit in the back for the power lead to pass through. The 8-mm hole in the bottom will hold a 8-mm neodymium magnet which mates with another that's glued to the plane' | ||
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+ | {{http:// | ||
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+ | L-shaped ABS strip to attach camera and Tx to, front view | ||
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+ | {{http:// | ||
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+ | L-shaped ABS strip to attach camera and Tx to, back view | ||
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+ | When the 5-min epoxy has cured you're left with a sturdy, yet miniature, FPV camera setup that' | ||
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+ | {{http:// | ||
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+ | The finished miniature FPV camera, looking spiffy | ||
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+ | Obviously this little how-to wouldn' |
parametragemicroemetteur.txt · Dernière modification : 05/01/2022 17:30 de wikiadmin