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Where are the 5V pins on the STM32 base?
Clock Speed Warning: The +5V pins on this board are directly connected to the +5V pin of the USB connector. There is no protection in place. Do not power this board through USB and an external power supply at the same time. Warning: This board may have a wrong value of resistor on the USB D+ pin.
Why does STM32F103 cannot upload to Bluepill?
Close all other programs which use the STLink, like ST-Link utility. I think it just can’t open the adapter. In addition to what @manuelbl said, make sure that you follow the Nucleo user manual chapter 6.2.4 exactly.
Is there protection on a STM32 base board?
There is no protection in place. Do not power this board through USB and an external power supply at the same time. Warning: This board may have a wrong value of resistor on the USB D+ pin. Instead of a 1.5kΩ it has either a 10kΩ or 4.7kΩ resistor. This can be solved by replacing the resistor with the right value.
Can a blue pill be connected to a serial port?
With the USB port for device mode, one could present a virtual serial port over USB, connected to a real serial port. I already have one of these devices (in fact, a USB-to-serial adapter (or a USB-to-SWD adapter) was required to program the blue pill from a PC), but it’s a simple yet useful application worth touching on.
What kind of power supply does the STM32F427 use?
The STM32F427 is powered by 3.3V but many of it’s pins are 5V tolerant. This allows external chips to drive it’s logic I/O pins at 5V without damaging the device. I have a board design with at STM32F427 that operates off of two voltage supplies: 3.3V and 5V.
How much current can a GPIO STM32F4 handle?
EDIT: If your using the GPIO’s STM32F4 as inputs, then I would consider how much current the input can be sourced. It must not exceed 5mA. The datasheet explicitly states that the power must not exceed Vdd+4V. If the peripheral is at 5V and the Vdd is at 0V, then technically you would be violating the absolute maximum ratings.
How does servo attach work on the Blue Pill?
When servo.attach () is called on a certain pin, the hardware timer responsible for creating the PWM signal is set to a certain period/frequency. On the Blue Pill, this period/frequency is synchronized across all pins that the timer is responsible for.
What kind of regulator does the Blue Pill Arduino use?
Operates on 3.3V, rather than 5V on an Arduino. The Blue Pill’s 5V regulator is not the best in the world, especially when sourced from cheap Chinese sites, so don’t expect the Blue Pill to be able to run a lot of LEDs or Servos. The stock 3.3V regulator can handle up to 300mA.