Quantity   Component name
1 × ESP8266 (NodeMCU) WiFi controller board
1 × BQ32000 Clock and Timer ICs / Real-Time Clocks
1 × HV5812 Power Management ICs / Display Drivers
1 × EECS0HD224H supercap Capacitors / Electric Double-Layer (EDL)
1 × 74HC595 Electronic Components / Misc. Electronic Components
1 × MMBTA42 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
1 × Piezo crystal
1 × Misc passive components and connectors