Led panel 2
tmarhguy·alu·schematics/kicad/boards/led_panel/led_panel_2/led_panel_2.kicad_pcb
About the Led panel 2 PCB
Led panel 2 is an open source PCB design by tmarhguy, published on GitHub under the MIT license. It is a 2-layer board measuring 78.5 × 68.5 mm, with 129 components from 12 distinct parts.
By type, the board carries 112 transistors, 8 diodes, 8 resistors and 1 connector.
From the project
8-bit combinational ALU built from scratch with 3,488 CMOS transistors (KiCad + SPICE + Logisim + 1.24M tests
Individual PCB boards for the 8-Bit Transistor ALU system
This directory contains KiCad projects for each functional board in the ALU system.
Note: The ALU can be implemented as: - Monolithic: Single 270×270mm board (alu/) - Modular: Separate boards (mainlogic/, addsub/, flags/, main_control/)
Current implementation uses modular approach for easier assembly and debugging.

Led panel 2 bill of materials (BOM)
129 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 56 | PMOS | TSOT-23 | Q201, Q206, Q207, Q208, Q209, Q301, Q401, Q501 +48 |
| 56 | NMOS | TSOT-23 | Q202, Q203, Q204, Q205, Q210, Q302, Q402, Q502 +48 |
| 1 | Conn_01x10_Socket | Harwin_Gecko-G125-FVX1005L0X_2x05_P1.25mm_Vertical | J101 |
| 1 | LED8 | LED_D3.0mm | D101 |
| 1 | LED9 | LED_D3.0mm | D102 |
| 1 | LED10 | LED_D3.0mm | D103 |
| 1 | LED11 | LED_D3.0mm | D104 |
| 1 | LED12 | LED_D3.0mm | D105 |
| 1 | LED13 | LED_D3.0mm | D106 |
| 1 | LED14 | LED_D3.0mm | D107 |
| 1 | LED15 | LED_D3.0mm | D108 |
| 8 | 330 | R_0805_2012Metric | R101, R102, R103, R104, R105, R106, R107, R108 |
Led panel 2 design files
The KiCad project lives in the tmarhguy/alu repository on GitHub; these links point at the commit this page was built from.
Led panel 2: common questions
How big is the Led panel 2 PCB?
The Led panel 2 measures 78.5 × 68.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Led panel 2?
129 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the Led panel 2 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 Led panel 2 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
tmarhguy
110 × 117 mm200 parts2LMIT47Led panel 1
tmarhguy
101 × 68 mm131 parts2LMIT47Main logic
tmarhguy
98.5 × 95.5 mm122 parts2LMIT47Main control
tmarhguy
59 × 63 mm42 parts2LMIT47Led panel 3
tmarhguy
43.5 × 50.5 mm35 parts2LMIT47Flags
tmarhguy
41 × 35.5 mm26 parts2LMIT47Gate xnor 2in
tmarhguy
77.5 × 43 mm16 parts2LMIT47Gate xor 2in
tmarhguy
72 × 42.5 mm16 parts2LMIT47Gate and 4in
tmarhguy
5.4 × 18.7 mm10 parts2LMIT47Gate or 2in
tmarhguy
57.5 × 36 mm6 parts2LMIT47Gate and 2in
tmarhguy
42.5 × 32.5 mm6 parts2LMIT47