2 layers99.1 × 99.1 mm
2 layers99.1 × 99.1 mm
Alu adder
ksmonkey123/8bit_computer1custom 8bit microprocessor project
- Size
- 99.1 × 99.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 73
- Pads
- 228
- Tracks, vias
- 611, 16
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Dec 2024
- Updated
- 9 Sep 2026
Overview
Alu adder is an open-source printed circuit board by ksmonkey123, from the ksmonkey123/8bit_computer repository on GitHub, published under the MIT licence. It is a 2-layer board of 99.1 × 99.1 mm with 23 parts on 73 nets, routed with 611 tracks and 16 vias.
It is built around the 74AHC244D. Its parts include 9 ICs, 6 capacitors, 1 resistor and 1 connector.
Main components
1Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | C | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5, C6 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 2 | 4070 | Package_DIP:DIP-14_W7.62mm_LongPads | U4, U5 |
| 2 | 4071 | Package_DIP:DIP-14_W7.62mm_LongPads | U8, U9 |
| 2 | 4081 | Package_DIP:DIP-14_W7.62mm_LongPads | U6, U7 |
| 2 | 74LS283 | Package_DIP:DIP-16_W7.62mm_LongPads | U1, U2 |
| 2 | Conn_01x16 | Connector_IDC:IDC-Header_2x08_P2.54mm_Horizontal | ADDRESS_BUS1, DATA_BUS1 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 74AHC244 | Package_DIP:DIP-20_W7.62mm_LongPads | U3 |
| 1 | C_Polarized | Capacitor_SMD:CP_Elec_5x5.3 | C1 |
| 1 | Conn_01x10 | Connector_IDC:IDC-Header_2x05_P2.54mm_Horizontal | J1 |
Questions
How big is the Alu adder PCB?
It measures 99.1 × 99.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Alu adder use?
23 parts, built around the 74AHC244D. 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 Alu adder KiCad files?
From the ksmonkey123/8bit_computer repository on GitHub, at the commit this page was made from: the board is circuits/pc-05_alu_adder/alu_adder.kicad_pcb and its schematic circuits/pc-01_dual_8bit_register/dual_8bit_register.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Alu adder design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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