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Utterly simple and useful circuits for protect your device against incorrect power supply polarity (reverse polarity) connection:

• High Side (based on P-Channel MOSFET)
• Low Side (based on N-Channel MOSFET)

This really simple thing can save the life of your electronic device, without taking up much space, thanks to modern miniature transistors.

Simplest blinking circuit, implemented in small board with convenient mounting hole.

Easy way to open built-in serial terminal in STM32CubeIDE without any additional plugins.

This simple library give you a chance to using buzzer as sound notification with the possibility to set number of beeps and period between them.

Setup is very easy, because it's fully compatible with HAL and Cube code generator, all you need it's config chosen pin and set label BUZZER. And here is example of use:

Buzzer_Go(TBUZ_100, TICK_2);

Here is small essay with demonstration of work., that describes how to use ordinary breakpoints and special condition-breakpoints ?.

STM32 microcontrollers have got internal temperature sensor, that connected to one of ADC-channels, that makes possible in easy way get your device temperature without any additional components. This rough measurements can be used to estimate gadget status.

Tested on: STM32F401CCU6 (Black Pill)
Temperature range: -40°C to 125 °C
Accuracy: ±1.5 °C

The most widespread Li-ion charger controller chip — TP4056. Here you can find tested circuit diagram and printed circuit board (full KiCad project) with TP4056and USB Type-C connector, that compatible with Power Delivery chargers (5V 3A output).

Assembling Android oscilloscope based on STM32F401/STM32F411 microcontroller with additional WiFi SoC ESP32 module, that give a chance to get wireless Wi-Fi connection and remotely monitoring signals.

Instruction to convert your Altium Designer PCB (.PcbDoc) to KiCad (.kicad_pcb).

Here is a full build instruction of 2CH USB Type-C Android oscilloscope based on STM32F401/STM32F411 board. Another one feature of this device is possibility to wireless Wi-Fi connection, that give a chance of remotely signals monitoring, but it needs ESP32 in addition.