Hi everyone,
I have a craft that flies fine on its own. I have printed a small flashlight (a PCB with 16 small LEDs, a battery, two short wires and some steel screws to keep it together), and the compass becomes less happy when I mount it on the quad.
I have two questions: What exactly is affecting the compass reading, and how can I reduce interference? Unfortunately I can’t put the flashlight farther away due to the design, but is there anything else I can do?
What is the biggest culprit here? The steel screws, the battery, the PCB or the current running in the system? How can I mitigate things?
hi
you want to avoid the interference of other magnetic fields other than the earth, and get to capture this as best as possible.
first, do not put any ferromagnetic or metal objects near the compas. This can divert the natural magnetic field of the earth in an “unnatural”, unwanted direction,
Second
keep the compass and its data cables (at least 15cm), any cable that is powered, and even data,
If this is not possible, then use coaxial cables or intertwine pairs of cables with their respective GND’s, to avoid loops that generate a distant magnetic field.
by last.
keep ESC away, all the power electronics, the compass and the gps need to be separated from practically all the electronic modules of the device even electronic low power, since the pcbs themselves are metal plates that with their movement relative to the fields Magnetic can self-induce and therefore modify the surrounding magnetic field.
So in summary:
move metal parts away
removes cables and batteries
interlace the power cables with their respective grounds
and sign the signal cables with their respective grounds
P.S:
to say that the compas must be well attached to the fuselage of the device
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