Quantity   Component name
2 × V2/V3 - IN12A Nixie Tube
2 × V1/V4 - INS-1 Neon Indicator Bulb
1 × U1 - HV5530PG-G 44PQF
1 × C1 - 100nF 50V 0805
1 × C2 - 10uF 25V 1206
2 × R1/R4 - 100-270K 150V 1/4W 0805
2 × R2/R3 - 15K 150V 1/4W 1206