Marabou Stork, my Depron FPV airplane had a bad luck. Few weeks ago, when I was testing development version of INAV, it crashed during take off. Poor accelerometer calibration combined with a software bug resulted in heavy roll 2 meters above ground. As a result, whole front section was smashed. Everything else more less survived.…

Today I’ve discovered another small but irritation limitation of Airbot F4 / Flip32 F4 also known as CC3D REVO for unknown reason. Looks like, by default, this board is unable to share UART1 RX line and PPM input. So, if you would like to connect, for example, OSD or GPS to UART1, you would have…

Year after year flight controllers grow stronger, faster, more powerful. Three years ago we had MultiWii running Arduino. Two years ago it was Naze32 with STM32F1. Year ago it was SPRacingF3 with SMT32F3. This year it is something with STM32F4. Is there a price is power consumption to pay? Should we start using stronger BECs?…

When I’ve buoght an oscilloscope (cheap digital DSO201), I’ve decided it would be a good idea to see how different ESC protocols looks like from the signal point of view. Previously I’ve written few words about them, like which is the fastest as so on, but is there something “special” about them? Well, let’s find…

While BLHeli was the best what happened to ESCs since original SimonK firmware, BLHeli has one very serious flaw: BLHeliSuite works only on Windows operating system. Let's be honest here, this sucks. OK, one can use virtual machine and some people succeeded to run it using WINE (I failed) but those are not good solutions.…

There is very little reliable information about Flip32 F4 / Airbot F4 on the internet, so I’ve decided to fix it. Today, pinout map for Flip32 F4 (Betaflight 3.0.1) and some additional notes: Betaflight 3: use REVO target UART1 is only UART with inverters, so S.BUS can be connected only here S.BUS / PPM pin…

Yesterday I’ve received new flight controller for my Reptile X4R 220 quadcopter: Flip32 F4 from ReadyToFlyQuads. This is my first contact with STM32F4 based flight controller and I’m really looking forward to see if it really puts a difference comparing to F3 boards like SPRacingF3 I’ve been using last few months. Some features: STM32F405 CPU…

My Depron FPV airplane is ugly! Good thing is flies quite well…

Recently I’ve got my hands on a pair of cheap APM Power Modules from eBay with integrated 5V BEC and current meter (90A max). Although they are APM designed and will not work stright away with STM32 flight controllers like Naze/CC3D/SPRacingF3 (or rather would work only once since they are 5V scaled and those flight…