Quantity   Component name
1 × PCB (see OSH Park link)
1 × STM32F030F4P6 48 MHz Cortex-M0, 16 KB flash, 4 KB RAM, TSSOP20
2 × 0603 cap, 100 nF
1 × 0603 cap, 10 nF
1 × 0603 LED Don't forget to pick a suitable current limiting resistor for your LED
1 × 0603 resistor, 330 ohm current limiting for the LED
1 × 0603 resistor, 10 kOhm BOOT0 pull-down
1 × KMR push button for the reset line
1 × Headers (10 pins, 9 pins and 5 pins)