Quantity   Component name
1 × STM32G031F6 Microcontroller
1 × SPH0645LM4H-B Microphone
1 × KXOB25-02X8F-TR Solar cell
2 × 6TPE330MAP Capacitors / Tantalum Electrolytic
1 × LM3670MF-1.8/NOPB Power Management ICs / Switching Regulators and Controllers
10 × APTD1608LSURCK Low-current bright red LEDs
1 × JS202011JCQN On-off switch
12 × Discretes (see source repo!)