Bitcraze Forums

But this are Li-Po batteries, can be applied same graph?

Hi all, I was checking battery level measurment and found this levels: 3.00, // 00% 3.78, // 10% 3.83, // 20% 3.87, // 30% 3.89, // 40% 3.92, // 50% 3.96, // 60% 4.00, // 70% 4.04, // 80% 4.10 // 90% I see a leap between 3.0v and 3.78v, and a non costant increase between other values. Are this exper...

Hi all, I want to ask if there's particular considerations to take in account about interrupts and stabilizator algorithm. I see that stabilizator task stay in delay and starts 500 times in a second. But since you are using RTOS(I don't know a lot about it) you have setted some kind of priority on s...

Hi all,

I want to ask if someone have tryed this with current crazyflie firmware. I want to ask, if I flip motors and I have sensors upside down, stabilization algorithm will still work? if no, it's is possible to make it work with something like changing some signs or it's more complex?

Thank you!

Hi all, I've found some discrepancies between BQ24075 datasheet and crazyflie application. In schematics I've found that is used 10kOhm resistor for TMR when datasheet specifies min. 18kOhm. This may create some problems? The timer is actually reduced or BQ acts like it have a 18kOhm resistor? Also,...

Hi all,

I've found that there is also USB interface support on crazyflie 2.0 with d+ and d- connectors. But there is already some kind of use of this interface? Or what can be potential uses?

Thank you!

Hi all, I've found this about microcontroller used in Crazyflie 1.0 "The STM32F103CB MCU we run at full speed, 70Mhz.. ..We use about 40% of its processing power (with a stabilization update loop at 500Hz) and a big chunk of this is because we use a “blocking” I2C driver." I'm interesed wi...

I've tryed again with another microcontroller and found that when I set output to high(output is PWM output, 100% duty) and connect to MOSFET, motor doesn't throttle. I've tryed 2 microcontroller and have the same problem. I've tryed to connect an external source(battery) to MOSFET PWM pin an this t...

I've tryed to use PMV for motor control, but they acts stange. I've used same configuration but with 9.4kOhm resistor instead 10kOhm and 3v3 for input. It work up to 50% pwm and stop working from 50% to 100%. Why that? PWM or PMV mosfet? Could you provide more information? I've used PMV31 mosfet wi...

Hi all, I've looked into schematics for crazyflie 2.0 and can't understand why batteries are connected in this way to NRF518 with VBAT and VBAT_SINK. It's used a voltage divider to down voltage from 4.2v to 1.4V but internal ref. is 1.2, how can you measure correctly battery level? Why VBAT_SINK is ...