Quantity   Component name
1 × ATMEGA328P Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
2 × 0.1uF 50V Capacitor Ceramic, 0805
1 × SMD Speaker Optional
1 × 0.96" 128x64 OLED SSD1306, 6 Pin SPI
1 × Tact Button Through Hole
1 × 16MHz Crystal, 5032 5x3.2mm, 2 Pad SMD
1 × 10K Resistor SMD, 0805
1 × CR2032 Battery Holder PTH