HardLabs

Alu

lorenzonotaro·lncpu·v1/kicad/alu/alu/alu.kicad_pcb

Alu PCB layout, top view — open source board by lorenzonotaro

About the Alu PCB

Alu is an open source PCB design by lorenzonotaro, published on GitHub. It is a 2-layer board measuring 200 × 150 mm, with 45 components from 14 distinct parts.

Other key parts include the 74LS138, 74LS283, 74LS32, 74HCT541 and 74LS08. By type, the board carries 22 capacitors, 21 ICs and 2 connectors.

From the project

v1 is the current implementation of the lncpu.

v1 is the current implementation of the lncpu.

The clock cycle is divided in two phases: Φ1 (control phase) and Φ2 (data phase).

During Φ1, the data bus contains the contents of [CS:PC]: only the device mapped to the memory section containing address CS:PC` is allowed to write to the data bus, regardless of control signals.

* During Φ2, bus control is determined by the control signals of the current microinstruction.

Alu, from the project README
From the project README

Main components on the Alu

74LS13874LS28374LS3274HCT54174LS0874LS8674LS04LNCPU Type B Header

Alu bill of materials (BOM)

45 components, 14 distinct parts.

QtyPartRefs
1
74LS138
U1
2
74LS283
U2, U15
2
74LS32
U3, U4
5
74HCT541
U5, U6, U9, U12, U18
3
74LS08
U7, U8, U19
5
74LS86
U10, U11, U16, U17, U21
2
74LS04
U13, U14
1
LNCPU Type B Header
U20
1
X_{in}
J2
1
Y_{in}
J3
15
100n
C1, C2, C3, C4, C5, C6, C7, C8 +7
5
220n
C16, C17, C18, C19, C20
1
47uF
C21
1
1uF
C22

Alu design files

The KiCad project lives in the lorenzonotaro/lncpu repository on GitHub; these links point at the commit this page was built from.

Alu: common questions

How big is the Alu PCB?

The Alu measures 200 × 150 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Alu?

45 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the Alu design files?

From the lorenzonotaro/lncpu repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Alu design in my own project?

The repository has no license, so all rights stay with lorenzonotaro. Use it as a reference, and ask the author before reusing the design.

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