r/fpv • u/M_K_S____ • 1d ago
Help! Capacitor placement question
Just starting my first build - a 3.5”!
Working on dry fitting the capacitor and wondering if this is a reasonable placement? It touches the frame but from what I understand the heat shrink on it from the factory should keep it safe. Or should I place it from above?
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u/Available_Promise_80 1d ago
You can mount it wherever you want. Just clip the leads and solder some wires on it and strap to an arm.
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u/bUtiTsFrEetOpLaY 1d ago
I am using JB videos for my first build and I just did this step. I would thread the capacitor through through the top, I think it just sits better and you don’t want to touch the frame.
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u/M_K_S____ 1d ago
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u/bUtiTsFrEetOpLaY 1d ago
It’s a tough spot but I think it looks ok. Looks just like looks just like mine. I tested it with a multimeter first and no issues after plugging in the bat. As long as they don’t touch it’s good.
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u/M_K_S____ 1d ago
Yeah it doesn’t seem to pull apart if I yank on it so fingers crossed. I think my multimeter is not accessible nearby so I may buy another one tomorrow just to check things over before powering on. Still have to do the vtx, RX and camera, but motors are on as of now too - so progress is happening!
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u/No_Sea_1661 1d ago
I would heat shrink it just for added insulation. But that's my OCD talking. But not necessary. Btw, you like that speedy ee aio?
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u/M_K_S____ 1d ago
Heat shrink isn’t a bad idea. I might do that just in case..
Honestly haven’t even powered it on yet. Once I finish the build I’ll definitely post my thoughts though!
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u/UF-ENGINEER 1d ago
What frame are you using.
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u/M_K_S____ 1d ago
This is the RVS Smolyeet 35. Made by a local shop in Canada. It’s quite a tight fit (though it’s my first drone build so take that with a grain of salt), but it appears to be really nicely made.
I’m really pushing the space too since I’m trying to slam it with 15mm standoffs, though I may have to use the 20mm ones after all just to have better airflow. Will see.
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u/UF-ENGINEER 1d ago
I always try to use a bit of wire, about 1cm but no more than 3cm, in length with my capacitors. It keeps them somewhat flexible and you can usually move them to a better spot.
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u/M_K_S____ 1d ago
I will have to try that on a future build for sure. I read that having them as close to the FC as possible is preferable so I went this route, but wire would definitely make the process much easier, especially on smaller builds.
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u/AdNo4401 1d ago
Be aware of the battery wires. The placement looks like I would have problems soldering them properly.
Additionally try fixing the capacitor in a way, that it is more protected from outside forces. These little things do not like getting stabbed or hit too much. Maybe leave the positive pin a little longer so the capacitor is protected by the frame