I recently stumpled upon this nice 3D printed 18650 sized battery case for FPV goggles. As i needed some more batteries for my Skyzone SKY-02 FPV goggles i gave it a try. I opened a “broken” and no longer charging Lenovo Battery pack and removed the 6 Li-Ion Cells. They turned out to be 18650… Read More »
I recently bought a Micro HappyModel F3 EVO Brushed flight controller on banggood. This is a really nice and small flight controller for brushed quadcopter builds as it features a powerful and future-proof STM32F3 CPU. A quick test with the betaflight configurator revealed it was delivered with Cleanflight 1.13.0 (Cleanflight/SPRACINGF3EVO 1.13.0 Jun 6 2016 /… Read More »
All STM32F3 based flight controller boards and various other hardware using a STM32F3 CPU can be upgraded using the DFU protocol over an USB connection. This DFU bootloader resides in the ROM of the STM32 core and is not erasable, so this bootloader is un-brickable (yay!). In order to flash those boards one needs a… Read More »
I did some Thrust measurements for a 150/160 sized quadcopter frame. The tests were done using an Eachine 1306 3100KV motor in combination with a Blheli_S 20A ESC (Racerstar 20A Blheli_S). The setup was powered with a lab power supply at a constant voltage of 12V simulating a nearly full charged 3S LiPo battery. In… Read More »