Quantity   Component name
1 × BT1 9V Battery Clip Keystone P/N 967
1 × C1 10uF SMD 0805 >16V
1 × C2 10nF SMD 0805 >16V
27 × D1 ~ D27 LED SMD 0805 Any Color, 1.95V ~ 2.05V, 10mA
1 × R1 33k SMD 0805
1 × R2 ~ R10 300R SMD 0805 Adjust value according to LED voltage/current
1 × U1 LM555 Timer, SOIC-8
1 × U2 CD4020 Binary Counter SOIC-16 (can also use CD4040)