Z80VDP1A
About the Z80VDP1A PCB
Z80VDP1A is an open source PCB design by lynchaj, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 90 components from 39 distinct parts.
Other key parts include the 74LS244, 74LS245, 74LS688, FMS6141 and 74LS02. By type, the board carries 27 resistors, 25 capacitors, 14 ICs, 7 connectors, 5 transistors and 4 jumpers.
It belongs with the retro computing designs in this gallery.
From the project
Modular Backplane Computer
Z80 VPD1A is a board for V9938/V9958 using discrete components for video output stage
Main components on the Z80VDP1A
Z80VDP1A bill of materials (BOM)
90 components, 39 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 74LS244 | DIP-20_W7.62mm | U1, U3 |
| 1 | 74LS245 | DIP-20_W7.62mm | U2 |
| 1 | 74LS688 | DIP-20_W7.62mm | U4 |
| 1 | FMS6141 | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | 74LS02 | DIP-14_W7.62mm | U6 |
| 1 | 74LS32 | DIP-14_W7.62mm | U7 |
| 1 | 74LS06 | DIP-14_W7.62mm | U8 |
| 1 | 74LS174 | DIP-16_W7.62mm | U10 |
| 4 | D41464C | DIP-18_W7.62mm | U13, U14, U15, U16 |
| 1 | LM1881 | DIP-8_W7.62mm | U23 |
| 5 | 2N3904 | TO-92_HandSolder | Q1, Q2, Q3, Q4, Q5 |
| 1 | 21.47727 MHz | Crystal_HC49-4H_Vertical | X1 |
| 1 | VY/VCC | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | INT#/NMI# | PinHeader_1x03_P2.54mm_Horizontal | J2 |
| 1 | CSYNC | PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | RGB TTL | PinHeader_2x05_P2.54mm_Horizontal | P1 |
| 1 | SPARES | PinHeader_2x05_P2.54mm_Vertical | P2 |
| 1 | Z80 BUS BACKPLANE | PinHeader_2x25_P2.54mm_Horizontal | P3 |
| 1 | RAMDAC | PinHeader_2x08_P2.54mm_Vertical | P4 |
| 1 | BUSCLK | PinHeader_1x02_P2.54mm_Vertical | JP1 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | OPTGND | PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | OPTWAIT | PinHeader_1x02_P2.54mm_Vertical | JP3 |
| 1 | CSYNCOPT | PinHeader_1x02_P2.54mm_Vertical | JP4 |
| 1 | 10K | R_Array_SIP9 | RR1 |
| 1 | IO PORT ADDR | SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW1 |
| 4 | LED | LED_D3.0mm | D1, D2, D3, D4 |
| 1 | INDUCTOR (BEAD) | LairdTech_28C0236-0JW-10 | L1 |
| 15 | 0.1u | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +7 |
| 2 | 10u | CP_Radial_D5.0mm_P2.50mm | C10, C11 |
| 4 | 0.22u | C_Disc_D5.0mm_W2.5mm_P5.00mm | C12, C13, C14, C15 |
| 2 | 33p | C_Disc_D5.0mm_W2.5mm_P5.00mm | C22, C23 |
| 1 | 22u | CP_Radial_D5.0mm_P2.50mm | C25 |
| 1 | 220u | CP_Radial_D6.3mm_P2.50mm | C26 |
| 9 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R5, R10, R11, R19, R22 +1 |
| 6 | 1000 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R8, R9, R12, R20, R23 |
| 2 | 0 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R16 |
| 4 | 4700 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R15, R17, R24 |
| 1 | 680K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13 |
| 5 | 75 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R14, R18, R21, R25, R30 |
Z80VDP1A design files
The KiCad project lives in the lynchaj/nhyodyne repository on GitHub; these links point at the commit this page was built from.
Z80VDP1A: common questions
How big is the Z80VDP1A PCB?
The Z80VDP1A measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Z80VDP1A?
90 components, from 39 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Z80VDP1A design files?
From the lynchaj/nhyodyne repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Z80VDP1A design in my own project?
The repository has no license, so all rights stay with lynchaj. Use it as a reference, and ask the author before reusing the design.
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