Quantity   Component name
1 × STM32F030F4P6 The controller it's all about
2 × Pushbuttons One for reset, one for all the other purposes
6 × LEDs 1 as a power indicator, 5 freely controllable
1 × Micro-SD card holder (type TFP-09)
1 × MCP1700-3302 or compatible (SOT-23) Small 3.3 V LDO
1 × 1117-3.3 or compatible (SOT-223) Slightly larger 3.3 V LDO
1 × SOT-23 MOSFET to switch off the SD card's power e. g. IRLML6401