Your BCD display or counter circuit is missing one chip and the 4026 is it. A decade counter in standard CMOS — no substitutes, no hunting through marketplace listings for a match. This is the exact part your schematic calls for. $5 RRP
| brand | JAYCAR |
| sku | ZC4026 |
| category | ELECTRONICS & COMPONENTS |
| subcategory | ELECTRONIC COMPONENTS |
| rrp | $5.00 |