Seeedstudio delivers great PCB's for a small price, so that's why I decided to design my own PCB for the STM32. I wlll be using the STM32F102C6.



Component view of the bare PCB


Solderside view of the bare PCB


Component view of the soldered PCB


Solderside view of the soldered PCB

The board contains a lot of things:
USB connector for power, and hopefully once for communication with PC
1-Cell lipo charger (USB is used power source)
LDO Regulator for the onboard 3,3V
LDO can be turn on and off with onboard on/off slide switch
The heart: an STM32F102C6 with 8Mhz Murata resonator and 32.768Khz RTC crystal
Reset switch and 1 user button
3 LEDs and 1 LED for battery charge indication
Light sensor (TEMT5000 )
I²C Temperature sensor (STTS75 )
3 axis accelerometer (MMA7455 or ADXL345 )
3 axis gyro (L3G4200D )
3 axis magneto (compass) (HMC5843 )
Micro SD card

Available for about 10€: STM32VLDISCOVERY . It features an onboard microcontroller with some basic hardware, but has also the ability to program an external micro.

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