Gate and 4in
About the Gate and 4in PCB
Gate and 4in is an open source PCB design by tmarhguy, published on GitHub under the MIT license. It is a 2-layer board measuring 5.4 × 18.7 mm, with 10 components from 2 distinct parts.
From the project
8-bit combinational ALU built from scratch with 3,488 CMOS transistors (KiCad + SPICE + Logisim + 1.24M tests
This directory contains individual circuit modules organized by component type and specifications.
The modules are organized to match the component inventory requirements:
- adder1/ - Single-bit full adder - adder2/ - 2-bit full adder - adder8/ - 8-bit full adder
- alucore/` - ALU core module integration
1. Primary Modules: Use the organized subdirectories (e.g., gateand/gateand4in/`) for new designs matching the component inventory.
Gate and 4in bill of materials (BOM)
10 components, 2 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | PMOS | TSOT-23 | Q101, Q106, Q107, Q108, Q109 |
| 5 | NMOS | TSOT-23 | Q102, Q103, Q104, Q105, Q110 |
Gate and 4in design files
The KiCad project lives in the tmarhguy/alu repository on GitHub; these links point at the commit this page was built from.
Gate and 4in: common questions
How big is the Gate and 4in PCB?
The Gate and 4in measures 5.4 × 18.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Gate and 4in?
10 components, from 2 distinct parts. The full bill of materials is listed on this page.
Where can I download the Gate and 4in design files?
From the tmarhguy/alu repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Gate and 4in design in my own project?
Yes, under the terms of its MIT license, which tmarhguy chose for the repository.
More boards in alu
Add sub
110 × 117 mm200 parts2LMIT47
Led panel 1
101 × 68 mm131 parts2LMIT47
Led panel 2
78.5 × 68.5 mm129 parts2LMIT47
Main logic
98.5 × 95.5 mm122 parts2LMIT47
Main control
59 × 63 mm42 parts2LMIT47
Led panel 3
43.5 × 50.5 mm35 parts2LMIT47
Flags
41 × 35.5 mm26 parts2LMIT47
Gate xnor 2in
77.5 × 43 mm16 parts2LMIT47
Gate xor 2in
72 × 42.5 mm16 parts2LMIT47
Gate or 2in
57.5 × 36 mm6 parts2LMIT47
Gate and 2in
42.5 × 32.5 mm6 parts2LMIT47