ALU Extra
About the ALU Extra PCB
ALU Extra is an open source PCB design by Shmerlard, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 21 components from 10 distinct parts.
Other key parts include the AT28C16-15PC, 74LS08, 74LS04 and 74LS32. By type, the board carries 7 connectors, 4 ICs, 4 capacitors, 3 diodes and 3 resistors.
From the project
a custom 16bit cpu
hi, my name is elad and Im an electrical engineering student in Ben gurion university. I designed a small 16bit cpu, with a mix of jdh8, src, msp430 and the Hack computer. this is still a work in progress, but so far it works.
I used logisim for the logic design, draw.io for the diagrams. in order to see the working cpu in logisim: you need to build version 3.9.0 from source here, then just open the .circ file.
Main components on the ALU Extra
ALU Extra bill of materials (BOM)
21 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AT28C16-15PC | DIP-24_W15.24mm_LongPads | U1 |
| 1 | 74LS08 | DIP-14_W7.62mm_Socket_LongPads | U2 |
| 1 | 74LS04 | DIP-14_W7.62mm_Socket_LongPads | U3 |
| 1 | 74LS32 | DIP-14_W7.62mm_Socket_LongPads | U4 |
| 4 | Conn_01x02_Socket | JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal | J1, J2, J4, J7 |
| 2 | Conn_01x04_Socket | JST_XH_S4B-XH-A-1_1x04_P2.50mm_Horizontal | J3, J5 |
| 1 | Conn_01x03_Socket | JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J8 |
| 3 | LED | LED_2512_6332Metric_Pad1.52x3.35mm_HandSolder | D1, D2, D3 |
| 4 | C | C_Disc_D3.8mm_W2.6mm_P2.50mm | C1, C2, C3, C4 |
| 3 | R_US | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3 |
ALU Extra design files
The KiCad project lives in the Shmerlard/SH8 repository on GitHub; these links point at the commit this page was built from.
ALU Extra: common questions
How big is the ALU Extra PCB?
The ALU Extra measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the ALU Extra?
21 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the ALU Extra design files?
From the Shmerlard/SH8 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 Extra design in my own project?
The repository has no license, so all rights stay with Shmerlard. Use it as a reference, and ask the author before reusing the design.
More boards in SH8
Register
100 × 100 mm60 parts2LNo license18
Instruction Register
100 × 100 mm51 parts2LNo license18
ALU FLAGS CALC
100 × 100 mm48 parts2LNo license18
Register File Manager
100 × 100 mm41 parts2LNo license18
Status Register
100 × 100 mm40 parts2LNo license18
Program Counter
100 × 100 mm30 parts2LNo license18
ALU Shifter
100 × 100 mm15 parts2LNo license18
ALU Main
100 × 100 mm14 parts2LNo license18- schematic only · 13 parts
MDR Manager
13 parts2LNo license18 
Condition Control
100 × 100 mm12 parts2LNo license18