Quantity   Component name
1 × 1.3" OLED SH1106 I²C module
1 × ATTiny24 Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × SPDT switch
1 × piezo speaker
6 × 6x6mm tact switch, smd
5 × 2.2µF 0806 capacitor
1 × CR2032 battery holder
1 × 10µF 0806 capacitor
5 × M3 brass bolts with nuts
1 × 390kΩ 0806 resistor