

Educ 8 decoder
EDUC-8 recreation by Gwyllym Suter
- Size
- 220 × 160 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 88
- Pads
- 266
- Tracks, vias
- 995, 129
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 5 Mar 2023
- Updated
- 28 May 2026
Overview
Educ 8 decoder is an open-source printed circuit board by ibm2030, from the ibm2030/EDUC8 repository on GitHub. It is a 2-layer board of 220 × 160 mm with 27 parts on 88 nets, routed with 995 tracks and 129 vias.
It is built around the 74LS00SC, 74LS04PC and 74LS10PC, with the 74LS20P-E and 74LS259DC among its other parts. Its parts include 14 ICs, 6 capacitors, 2 resistors and 2 connectors.
Main components
574LS00SC
-0℃~+70℃ 15ns@5V,50pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA NAND Gate - Logic Gates ROHSTexas InstrumentsLogic Gates74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters74LS10PC
PDIP-140℃~+70℃ 3 3.3mA 4.75V~5.25V 74LS Series NAND Gate PDIP-14 Logic GatesonsemiLogic Gates74LS20P-E
DIP-14-20℃~+75℃ 15ns@5V,15pF 2 2.7V 2V 4 4.75V~5.25V 400mV、500mV 400uA 74LS 800mV 8mA NAND Gate DIP-14 Logic Gates ROHSRenesas ElectronicsLogic Gates74LS259DC
SBDIP-160.4mA 0ns 0℃~+70℃ 15ns 16ns 4.75V~5.25V 74LS 8 8mA Addressable Latch SBDIP-16 Latches ROHSTexas InstrumentsLatches
README
README.mdEDUC8
EDUC-8 recreation by Gwyllym Suter
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 74LS00 | Package_DIP:DIP-14_W7.62mm_LongPads | U1, U5, U7, U9, U10, U11, U12, U13 |
| 6 | 47nF | Capacitor_THT:C_Disc_D7.5mm_W2.5mm_P5.00mm | C1, C2, C4, C10, C11, C12 |
| 2 | 2K2 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1, R2 |
| 2 | 74LS04 | Package_DIP:DIP-14_W7.62mm_LongPads | U3, U14 |
| 2 | 74LS10 | Package_DIP:DIP-14_W7.62mm_LongPads | U2, U4 |
| 2 | Card_handle | EDUC-8:Card_handle | H1, H2 |
| 1 | 16-way-pcb-edge-Educ-8-connectors | Connector_PCBEdge:PCB_16pin | J2 |
| 1 | 32-way-pcb-edge-Educ-8-connectors | Connector_PCBEdge:PCB_32pin | J1 |
| 1 | 74LS20 | Package_DIP:DIP-14_W7.62mm_LongPads | U6 |
| 1 | 74LS259 | Package_DIP:DIP-16_W7.62mm_LongPads | U8 |
The 26 most common of 27 parts.
Questions
How big is the Educ 8 decoder PCB?
It measures 220 × 160 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Educ 8 decoder use?
27 parts, built around the 74LS00SC, 74LS04PC, 74LS10PC and 74LS20P-E. 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 Educ 8 decoder KiCad files?
From the ibm2030/EDUC8 repository on GitHub, at the commit this page was made from: the board is Decoder/educ 8 decoder.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Educ 8 decoder design in my own project?
Its repository states no licence, so its author keeps all rights: ask ibm2030 before reusing the design.
More from ibm2030/EDUC8
12- 2 layers283 × 96 mm

- 2 layers306 × 145 mm

- 2 layers220 × 160 mm

- 4 layers180 × 95 mm

- 2 layers150 × 100 mm

- 2 layers150 × 100 mm

- 2 layers150 × 100 mm

- 2 layers140 × 100 mm

- 2 layers125 × 113 mm

- 2 layers236 × 171 mm

- 2 layers283 × 96 mm

- 2 layers210.8 × 116.8 mm

Similar boards
- 2 layers365.1 × 203.2 mm

DIAG
Nakazoto/CenturionComputer
This is just a simple backup of all the files related to the Centurion that I have stored on my HD. The Wiki itself has far more in-depth information about the Centurion and it's individual cards.
150 parts172 - 2 layers364 × 203 mm

- 2 layers486 × 306.3 mm

- 2 layers630 × 300 mm

- 2 layers379.1 × 273.4 mm

NE Delta
frubem/NE_Delta_Schematics
Forked from https://codeberg.org/hkzlab/NE_Delta_Schematics
185 parts - 2 layers279.9 × 76.1 mm

AmdekDVM
schlae/AmdekDVM
Reverse engineering Amdek DVM video card for the Apple II
69 parts4CERN-OHL-P-2.0 - 2 layers349.3 × 160 mm

- 2 layers299.2 × 180 mm
