Gender
Male
About
Location
Los Angeles, CA
About Me:
Los Angeles HW/SW Hacker
Please tell us a bit about your UAV interest
Working on an STM32 autopilot.
Activity Feed
"Fuse the ITG3200 with a mag to handle slow rotations. Will it compete with infinite budget 1960s military hardware? Certainly not, but it's still pretty fantastic for $12, compared to what we had 2 years ago."
"Fair enough and well said. I do think the move to ARM will have many advantages."
"Popularity alone doesn't make something good. Once you're past the learning curve, the ARM MCUs are far superior to AVR8."
"Nice work."
"^-- The dream job for an entire generation."
"The "grab debian deps" step fails with "E: Unable to locate package scicoslab-gtk" on Debian 6.0 amd64.
I'm trying to build it from src but seems their git server is down.."
I'm trying to build it from src but seems their git server is down.."
"I like the Easy Glider Pro w/ HobbyKing electronics. Probably costs 2-3X more than a HawkSky but way better quality, higher lift capacity, etc."
"Great work, thanks for posting this John. To improve accuracy, we could store the high res data on a PC or cellphone and send relevant sections to the UAV as needed. Perhaps a MAVLink/QGC extension is in order."
"It's nice to combine the gyro + accel, but with modern MCUs I hardly see a need to offload the math. You can run a super-naive C floating point of DCM with like 5% of a $3 STM32."
Hi Everyone,I'm testing Madgwick's quaternion DCM C code with a Sparkfun 9DOF sensor stick. It's oscillating a lot due to the accel integral term (like 5-10 degrees peak-to-peak, lasting for minutes).I know the idea is to keep the P gain low, so…
"And it's not so easy to convert current to prop RPM, let alone air speed. 5A may mean the prop is running at a constant 2000 RPM, or accelerating from 100PRM to 200RPM. I suppose if you considered the commanded throttle too, you could design a…"
"Matthew is correct, this is an AC sensor. v(t) = L*di(t)/dt."
""Eliminate" iff the weather is perfect and you're in a wide open space with no multipath. In reality, you'll still want to fuse this with traditional sensors."
