2 layers283 × 96 mm
2 layers236 × 171 mm
Multiplexer
ibm2030/EDUC813EDUC-8 recreation by Gwyllym Suter
- Size
- 236 × 171 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 168
- Pads
- 454
- Tracks, vias
- 1,251, 148
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 5 Mar 2023
- Updated
- 28 May 2026
Overview
Multiplexer is an open-source printed circuit board by ibm2030, from the ibm2030/EDUC8 repository on GitHub. It is a 2-layer board of 236 × 171 mm with 53 parts on 168 nets, routed with 1,251 tracks and 148 vias.
It is built around the 74LS151PC, 74LS04PC and 74LS139PC, with the 74LS37P-E among its other parts. Its parts include 16 ICs, 12 connectors, 8 resistors, 8 diodes and 6 capacitors.
Main components
4
74LS151PC
DIP-160℃~+70℃ 12.5ns 4.75V~5.25V 400uA 6mA 74LS 8mA Tri-state output DIP-16 Signal Switches, Multiplexers, Decoders ROHSonsemiSignal Switches, Multiplexers, Decoders
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters74LS139PC
PDIP-1622ns 74LS 8mA Decoder Single Supply PDIP-16 Signal Switches, Multiplexers, DecodersonsemiSignal Switches, Multiplexers, Decoders74LS37P-E
--20℃~+75℃ 1 1.2mA 12ns 24mA 4 74LS Series - Flip Flops ROHSRenesas ElectronicsFlip Flops
README
README.mdEDUC8
EDUC-8 recreation by Gwyllym Suter
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 220R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8 |
| 8 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8 |
| 6 | C | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C1, C2, C3, C4, C5, C6 |
| 6 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J4, J5, J6, J7, J8, J9 |
| 4 | 74LS138 | Package_DIP:DIP-16_W7.62mm | U10, U11, U14, U15 |
| 3 | 74LS151 | Package_DIP:DIP-16_W7.62mm | U8, U12, U13 |
| 2 | 18-way-pcb-edge-Educ-8-connectors | Connector_PCBEdge:PCB_18pin | J23, J24 |
| 2 | 74LS04 | Package_DIP:DIP-14_W7.62mm | U3, U4 |
| 2 | 74LS75 | Package_DIP:DIP-16_W7.62mm | U6, U7 |
| 2 | Card_handle | EDUC-8:Card_handle | H1, H2 |
| 1 | 7400 | Package_DIP:DIP-14_W7.62mm | U20 |
| 1 | 74LS138 | Package_DIP:DIP-16_W7.62mm_LongPads | U9 |
| 1 | 74LS139 | Package_DIP:DIP-16_W7.62mm | U2 |
| 1 | 74LS164 | Package_DIP:DIP-14_W7.62mm | U1 |
| 1 | 74LS37 | Package_DIP:DIP-14_W7.62mm | U5 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | Conn_02x20_Odd_Even | Connector_IDC:IDC-Header_2x20_P2.54mm_Horizontal | J20 |
| 1 | Port_7 | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J10 |
| 1 | Port_8 | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J11 |
The 52 most common of 53 parts.
Questions
How big is the Multiplexer PCB?
It measures 236 × 171 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Multiplexer use?
53 parts, built around the 74LS151PC, 74LS04PC, 74LS139PC and 74LS37P-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 Multiplexer KiCad files?
From the ibm2030/EDUC8 repository on GitHub, at the commit this page was made from: the board is multiplexer/E8MX:M/multiplexer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Multiplexer design in my own project?
Its repository states no licence, so its author keeps all rights: ask ibm2030 before reusing the design.
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