Quantity   Component name
12 × D0 - D11 Standard 5mm LED, red
4 × R1 - R4 Resistor 100R, 0805
1 × R5 (reset pull-up) Resistor 10 to 47K, 0805
1 × C1 Capacitor 100n , 0805 (minimum 6V rating)
1 × U1 Attiny85-20 PU
1 × SW1 push button
1 × SW2 SS SMD402 (<a target="_blank" rel="noopener noreferrer" href="https://cdn-reichelt.de/documents/datenblatt/C200/DS_ESP_SERIE.pdf">https://cdn-reichelt.de/documents/datenblatt/C200/DS_ESP_SERIE.pdf</a>)
1 × BT1 CR2032 battery holder type KZH 20SMD-2 (<a target="_blank" rel="noopener noreferrer" href="https://cdn-reichelt.de/documents/datenblatt/D600/KZH20SMD-2.pdf">https://cdn-reichelt.de/documents/datenblatt/D600/KZH20SMD-2.pdf</a>)