I got a question - I am considering to try using STM32F103 board in my project except of an Arduino Pro Mini. It needs 3.3V (or 5V over supply).
I would be operating it on RC plane, and I want to hook it to the FPV camera battery, which is a 3.7V LiPo from old Smartphone. All extension modules (NEO-6M GPS, HC-12 433Mhz Comm, and GY-91 Gyro/Compass/Pressure) have 3-5 V in specification, so should work. Can the STM32 handle the 3.7V safely, over the 3.3 port? Or could it be fed to 5V IN?