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The reason for that is that it might be possible to build a very small and powerful quadrotor using the Bolt. Then the latency between the sensor readings and motor output will be more important. The SPI has lower latency and therefore this was chosen. It adds some possible compatibility issues tho...

I wonder is there any reason for changing I2C to SPI DMA way of reading sensors data in cf bolt?

Very nicely done! Did you also get the flow deck to work OK? I think there are some parameters that needs to be changed/tuned to compensate for the different inertia, weight and thrust. Yes, I re-tuned the PID controller, changed the thrustBase in the position_controller_pid.c to match the current ...

These days I've been working on somehow combine these two drones: https://cdn.shopify.com/s/files/1/1285/4651/products/CineBee-75HD-with-RuncamSplitNano_4_-1000x1000_700x700.jpg?v=1579823606 and https://www.bitcraze.io/images/Crazyflie2.0/Crazyflie2.0-585px.JPG . The first is iFlight Cinebee, it's v...

tobias wrote: ↑

Fri Jan 31, 2020 8:36 am

After checking the datasheet a bit more the operating voltage range is 4.35V to 6.4V, thus it will not regulate the voltage above ~6.4V so It looks like it can not be powered by more then that.
bq24075-vop-range.png

OK, I'd rather using a external 5V LDO instead.

And I found an interesting thing, when you remove the R24(which is connected to NRF51822 in the crazyflie 2.1 schematic), then connect the pin5 of NRF51822 to the VUSB, it works normal w/o battery. To me this sounds like a bad idea. You will put 11v on pin5? Or did you maybe remove R25? What I want...

What I want to do now is make the drone powered by 11v battery.

BQ24075 can support up to 18v input Maybe you can explain a bit more what you want to do. Even though the BQ24075 support high import voltage I don't think it supports much current before things will get hot. After some digging I also found the problem with the booltoader mode when running from USB...