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  • STM32F103C8T6 - Strange Thing

    Strange Thing


    Board Name Strange Thing
    Brand Unknown
    Origin AliExpress, China
    Microcontroller Part STM32F103C8T6
    Package LQFP48
    Core Cortex-M3
    FLASH 64KB
    SRAM 20KB
    Max. Clock Speed 72MHz
    Crystals HSE (High Speed External) 8MHz
    LSE (Low Speed External) 32.768kHz
    Power Sources Any +3.3V pin (+3.3V)
    Any +5V pin (+5V)
    USB connector (+5V)
    Regulator manufacturer Advanced Monolithic Systems Inc.
    Regulator part number AMS1117
    Regulator package SOT223
    Output +3.3V @ 1000mA
    Battery holder No
    Connectivity Headers 2x 2x8 male dupont (2.54mm)
    1x 1x13 male dupont (2.54mm)
    Specific None
    Debug SWD (1x4 male dupont (2.54mm))
    USB Micro
    I/O LEDs Power LED (+3.3V)
    User LED (PB0, sink)
    Buttons, switches and jumpers Reset button (NRST, NRST, active low)
    1-way jumper (BT0, BOOT0, active low)
    1-way jumper (BT1, BOOT1, active low)
    Other devices None
    PCB Colour Black
    Size 33mm x 34mm
    Mounting None
    • 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.


    Strange Thing

    Strange Thing Top view

    Strange Thing Bottom view

    Header 1

    Pin Connected to
    A14 PA14
    A15 PA15
    A12 PA12
    A13 PA13
    A10 PA10
    A11 PA11
    A8 PA8
    A9 PA9
    A6 PA6
    A7 PA7
    A4 PA4
    A5 PA5
    A2 PA2
    A3 PA3
    A0 PA0
    A1 PA1

    Header 2

    Pin Connected to
    3.3 +3.3V rail
    5V +5V rail
    GND Ground plane
    GND Ground plane
    C13 PC13
    C14 PC14
    C15 PC15
    3.3 +3.3V rail
    5V +5V rail
    GND Ground plane
    GND Ground plane

    Header 3

    Pin Connected to
    B14 PB14
    B15 PB15
    B12 PB12
    B13 PB13
    B10 PB10
    B11 PB11
    B8 PB8
    B9 PB9
    B6 PB6
    B7 PB7
    B4 PB4
    B5 PB5
    B2 PB2
    B3 PB3
    B0 PB0
    B1 PB1


    Pin Connected to
    VCC +5V rail
    D- PA11
    D+ PA12
    ID N.C.
    GND Ground plane


    Pin Connected to
    GND Ground plane
    CLK PA14
    DIO PA13
    3V3 +3.3V rail


    Pin Connected to
    GND Ground plane
    TXD PA9
    RXD PA10
    +5V +5V rail