itsy-bitsy teeny-weeny fully autonomous quadcopter
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fully assembled with battery, the device weighs 23.5 grams.
making it exempt from the FAA's new registration requirements.
I have a feeling this project will require a lot of ceiling paint...
parts received. assembly underway.
plastic frame http://shpws.me/KjFl
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It looks like the board is three layers. There is a single trace on the middle layer. Was space so tight that you needed an extra layer just for that trace?
it is actually 4 layers. the layers without traces are ground and vcc.
any component that needs to connect to gnd or vcc has a short trace on the top layer to a via which connects to it to the gnd or vcc plane.
What motors are you using?
hobbyking "0716". replacement parts for some sort of quad that they no longer sell.
how can you control, give orders to the copter?
I don't give it orders.
it is autonomous, it crashes into things of its own free-will.
...but do You plan to add some short of senses to this poor little blind copter? infrared or UH?
...or by adding propeller cover/protector, it could survive the bumps, and even the CPU could recognize this collisions by analyzing the IMU data
anyway good luck with the project!
I've used IR on other robotics projects, and wanted to here. the microcontroller has plenty of unused pins, but no room in one inch. next version, perhaps.
it is easy to detect bumps+crashes with the accelerometer, but I don't have a recovery algorithm better than "turn off motors", yet.
[verified: no design files missing]
I know the goal is to do a 1 inch project, however would your control board work w/ larger scale drone / props / motors assuming more energy storage and step up for the larger motors? Very interested in this as a lightweight controller.
the motor drivers won't handle too much more, they'd need to be beefed up,
and possibly the voltage regulator, if you want a higher voltage.
but the rest of the ckt should be fine.
This is your one-week reminder to upload design documents: https://hackaday.io/project/7813-the-square-inch-project/log/28566-design-deadline
Could you do a short post on the PCB, code, and other things involved in flight control?
I just updated the github with the schematic, board, and cad files. I'm still working on the code.
did you have questions?
I saw that the control board has an STM chip which made me immediately think of Paparazzi. Is your code Paparazzi based?
no, not based on anything
Look into Paparazzi. The code is very mature and is compatible with your main processor. You could potentially save a lot of development time by using it. (I'm biased as I worked with a system that was Paparazzi driven.)
Why are the rotors tilted inwards? Does it help with stability?
yes, it improves the stability. google the word "dihedral", if you are interested.
(but disclaimer: I am not an aeronautical engineer)
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when you design your own flight controller with an ARM 32bit MCU how do you make the firmware and software? isn't that more difficult or do you copy opensource information