These are the parts required to build SC521, v1.0, Z80 SIO Card for Z50Bus.
| Reference | Qty | Component |
| PCB | 1 | SC521, v1.0, PCB |
| C1 to C6 | 6 | Capacitor, ceramic, 100 nF |
| C7, C8 | 2 | Capacitor, ceramic, 22 pF |
| JP1 | 1 | Header, male, 2 row x 8 pin, angled, or
Header, male, 2 row x 8 pin, straight |
| JP2 | 1 | Header, male, 2 row x 2 pin, angled, or
Header, male, 2 row x 2 pin, straight |
| JP3, JP4, JP7 | 3 | Header, male, 1 row x 3 pin, straight |
| JP5, JP6 | 2 | Header, male, 2 row x 8 pin, straight |
| Jumper shunts | 15 | Jumper shunt
Two used to pad box header |
| P1 | 1 | Box header, 2 x 25 pin, angled, or
Header, male, 2 row x 25 pin, angled |
| P2, P3 | 2 | Header, male, 1 row x 6 pin, angled |
R1 to R4, and
R7 to R10 | 8 | Resistor, 2k2, 0.25W |
| R5, R6, R11, R12 | 4 | Resistor, 100k, 0.25W |
| R13 | 1 | Resistor, 10k, 0.25W |
| R14 | 1 | Resistor, 1k, 0.25W |
| R15 | 1 | Resistor, 1M, 0.25W |
| RN1 | 1 | Resistor network, 8 x 100k, SIL, 9-pin |
| S1, S2 | 2 | Header, female, 1 row x 6 pin, angled |
| Spacer | 1 | Spacer, 10mm, M3, nylon |
| Screw (for spacer) | 1 | Machine screw, 6mm, M3 |
| U1 | 1 | 74HCT688 |
| U1 socket | 1 | 20-pin DIP socket |
| U2 | 1 | Z80 SIO/2, Z84C4208PEG, or
Z80 SIO/2, Z84C4210PEG |
| U2 socket | 1 | 40-pin DIP socket |
| U3 | 1 | 74HCT74 |
| U3 socket | 1 | 14-pin DIP socket |
| U4 | 1 | 74HCT02 |
| U4 socket | 1 | 14-pin DIP socket |
| U5 | 1 | 74HCT393 |
| U5 socket | 1 | 14-pin DIP socket |
| X1 | 1 | Oscillator, 7.3728 MHz, or
Oscillator, 1.8432 MHz
Solder to PCB recommended
Software assumes 7.3728 MHz |
| X1 socket | 1 | 8-pin DIP socket
Socket not recommended |
| X2 | 1 | Crystal, 7.3728 MHz |
Homebrew 8-bit retro computing
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