2 layers99.7 × 149.9 mm
2 layers
Naz80-b
a-thousand-projects/Naz80- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 108
- Pads
- 346
- Tracks, vias
- 120, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Jan 2026
- Updated
- 1 Oct 2026
Overview
Naz80-b is an open-source printed circuit board by a-thousand-projects, from the a-thousand-projects/Naz80 repository on GitHub. It is a 2-layer board with 63 parts on 108 nets, routed with 120 tracks and 0 vias.
It is built around the 74LS04PC, 74LS139PC and 74LS14PC, with the 74LS32SC, HM62256BLP-7 and W27C512-45Z among its other parts. Its parts include 21 resistors, 11 diodes, 10 capacitors, 9 ICs and 9 transistors.
Main components
6
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
74LS139PC
PDIP-1622ns 74LS 8mA Decoder Single Supply PDIP-16 Signal Switches, Multiplexers, DecodersonsemiSignal Switches, Multiplexers, Decoders74LS14PC
PDIP-14InvertersTexas Instruments
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
HM62256BLP-7
DIP28DIP28 New Arrivals ROHSHITUncategorised
W27C512-45Z
PDIP-280℃~+70℃ 4.75V~5.25V 512Kbit Parallel Port (Parallel) PDIP-28 EEPROM ROHSWinbond ElecEEPROM
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 1k | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R2, R4, R6, R8, R10, R12, R14, R16, R18, R20 |
| 10 | 330 | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R3, R5, R7, R9, R11, R13, R15, R17, R19, R21 |
| 10 | LED | LED_THT:LED_D5.0mm | D2, D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 9 | 0.1uF | Capacitor_THT:C_Radial_D6.3mm_H7.0mm_P2.50mm | C2, C3, C4, C5, C6, C7, C8, C9, C10 |
| 9 | 2N3906 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 1uF | Capacitor_THT:C_Radial_D6.3mm_H7.0mm_P2.50mm | C1 |
| 1 | 2k | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R1 |
| 1 | 74LS04 | Package_DIP:DIP-16_W7.62mm_LongPads | U2 |
| 1 | 74LS139 | Package_DIP:DIP-16_W7.62mm_LongPads | U5 |
| 1 | 74LS14 | Package_DIP:DIP-16_W7.62mm_LongPads | U1 |
| 1 | 74LS32 | Package_DIP:DIP-16_W7.62mm_LongPads | U3 |
| 1 | 82C55A | Package_DIP:DIP-40_W15.24mm | U6 |
| 1 | CXO_DIP8 | Oscillator:Oscillator_DIP-8 | X1 |
| 1 | HM62256BLP | Package_DIP:DIP-28_W15.24mm | U9 |
| 1 | MC68B50 | Package_DIP:DIP-24_W15.24mm | U8 |
| 1 | ROM BANK Selector | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | JP1 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H9.5mm | SW1 |
| 1 | W27C512 | Socket:DIP_Socket-28_W11.9_W12.7_W15.24_W17.78_W18.5_3M_228-1277-00-0602J | U7 |
| 1 | Z80CPU | Package_DIP:DIP-40_W15.24mm_LongPads | U4 |
Questions
What parts does the Naz80-b use?
63 parts, built around the 74LS04PC, 74LS139PC, 74LS14PC and 74LS32SC. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Naz80-b KiCad files?
From the a-thousand-projects/Naz80 repository on GitHub, at the commit this page was made from: the board is Naz80-b/Naz80-b.kicad_pcb and its schematic Naz80-b/Naz80-b.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Naz80-b design in my own project?
Its repository states no licence, so its author keeps all rights: ask a-thousand-projects before reusing the design.
Similar boards
- 2 layers300 × 200 mm
Model 150
Julesc013/project-carbon
Hardware and software for custom CPUs, FPUs, and computer systems.
377 parts - 4 layers254 × 137.7 mm
S100 ColorMagic-1.1-006
RichCini/LomasBoards
Small repository of files/data related to Lomas Data Products S-100 boards.
150 parts1 - 2 layers279.4 × 203.2 mm
Z180GDC
lynchaj/rhyophyre
Single Board Computer featuring Zilog Z180 processor and NEC µPD7220 Graphics Display Controller
249 parts12 - 2 layers220 × 173.3 mm
SF-7017
fabiodl/sf7000
Most of the work was done by Andrea Ottaviani https://github.com/aotta
68 parts10GPL-3.0 - 2 layers253.2 × 203 mm
Pegasus2023
NeilsVintageComputers/1981_Aamber-Pegasus-2023-Revival
My first computer, this is a replica I produced from the original schematics using original old components.
156 partsUnlicense - 2 layers218 × 125 mm
EVA1
roberto314/EVA-1_Reproduction
Recreation of the very rare K-K Systems EVA-1 Display Adapter for the Epson HX-20 Computer
126 parts - 2 layers99.7 × 69.9 mm
