Quantity   Component name
1 × ATMEGA 328-PU Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × DS3231 Clock and Timer ICs / Real-Time Clocks
1 × 16MHz Crystal
2 × 2.2pF Ceramic apacitor
1 × CR1220 Batteries and Battery Accessories / Batteries
1 × 10k ohms SIL 4 resistor network
1 × 10k ohms 1/4W Resistor
3 × 100uF 16V Electrolitic capacitor
1 × AMS1117 3.3 3.3V LDO voltage regulator
1 × AMS1117 5.0 5V LDO voltage regulator
1 × 100pF Ceramic capacitor