2 W (bearbeitet 2 W)
Finished Kestrel FC (v1.0) Build - Success and Challenges
Finished my Kestrel FC (v1.0)!! So far everything works perfectly. I messed up one part (so the solder pads dont line up properly with the ordered part but i managed to connect it). I needed to switch to another component because the one I originally wanted wasnt available... but there are quite a few options. I just chose one without changing my design (sadly).
My ESC project is currently on hold as I ran into a few design issues placing components.....
Anyway I super happy that it works!! I needed to resolder the 3v3 buck and the BMI270 along the way as i didn’t properly seat them (using to much solder paste).
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2 W
Autor
♥️
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T
2 W
This is going to be the next big product man. How much? 😅
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2 W
We need this in the builder 😁
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2 W
did you end up using a stencil and can we get some solder pics when youre done? 10/10 cool!!!!
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2 W
Autor
I tried to use it but I ended up getting to much solder onto the pcb. so I placed the solder with a syringe step by step. Sometimes I got a bit much onto the pcb so I needed to redo it.. it was painful but rewarding so far. The solder points are quite ugly so I m not so sure if I should share close up images 🤣
Right now I got 2 problems with it (working on them since the early morning). It seems that the component which i messed up the solder points for is probably dead so i removed it. Now i can only connect it to the PC when a lipo is connected (which isnt that bad, at least not for a diy fc)
.. but the main issue right now is that I tried to use betaflights passthrough to check if I can actually flash a 4in1 esc through it which didnt work / still doesnt work. I just cant figure out why I can use bidirectional dshot to drive all 4 motors but it doesnt let me read them in the configurator. So I m back to check every tiny detail in my firmware to see where I messed up.
Overall it would work in a drone right now. but those issues need to be resolved before I can move on 😂
Right now I got 2 problems with it (working on them since the early morning). It seems that the component which i messed up the solder points for is probably dead so i removed it. Now i can only connect it to the PC when a lipo is connected (which isnt that bad, at least not for a diy fc)
.. but the main issue right now is that I tried to use betaflights passthrough to check if I can actually flash a 4in1 esc through it which didnt work / still doesnt work. I just cant figure out why I can use bidirectional dshot to drive all 4 motors but it doesnt let me read them in the configurator. So I m back to check every tiny detail in my firmware to see where I messed up.
Overall it would work in a drone right now. but those issues need to be resolved before I can move on 😂
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2 W
thats pretty sick and theyre definitely problems that happen with production hardware as well, so yeah pretty good!!! Im going to try to think of this while I attempt to update all my elrs and bf boards to the new generation of firmware, it's a nightmare! lol 🙃
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2 W
This should be the 250/250 approved part lol.
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T
2 W
do you have to program it?
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Autor
Of course otherwise it would just be a PCB with no function. So I needed to create my own firmware for it.
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T
2 W
was it easy? kinda wanna make me custom build one too. :)
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2 W
Autor
I would not say it's easy. It's quite a challenge depending on what you want it to be able to do. As space is limited on such a tiny PCB. If you are interested in building one there are multiple open source flight controllers on GitHub. Either you use them to design your own or just build one of them. The firmware is essentially one file which kinda contains instructions for betaflight. So it knows e.g. which pins and timers of the processor are used to control the motors. Or which pins of the processor are used for uart2 and so on...
As you can see from my posts I ran into multiple challenges but it's definitely doable! Also keep in mind that initially it will cost more than just buying an available FC from a known company. Especially since you also will need additional stuff like a digital microscope, a hotel plate and/or a hot air station, soldering iron and so on.. a few hundred bucks without knowing beforehand if it will work.
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