8bit adder
About the 8bit adder PCB
8bit adder is an open source PCB design by Lopfi, published on GitHub under the MIT license. It is a 2-layer board measuring 310 × 110 mm, with 344 components from 9 distinct parts.
By type, the board carries 243 resistors, 72 transistors, 25 diodes, 2 connectors and 2 switches.
From the project
A DIY 8 Bit Adder from single transistors
8bit adder bill of materials (BOM)
344 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 72 | Q_NPN_BCE | TO-92L_Inline | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +64 |
| 1 | Power | CUI_UJC-HP-3-SMT-TR | J1 |
| 1 | Conn_01x02_Socket | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 2 | Switches | SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW1, SW2 |
| 25 | LED | LED_D3.0mm | D1, D2, D3, D4, D5, D6, D7, D8 +17 |
| 25 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R31, R32, R33, R34, R62, R63, R91 +17 |
| 144 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R5, R6, R8, R9, R11, R12 +136 |
| 72 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R7, R10, R13, R16, R19, R22, R25 +64 |
| 2 | 5k1 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R29, R30 |
8bit adder design files
The KiCad project lives in the Lopfi/8bit-adder repository on GitHub; these links point at the commit this page was built from.
- Layout8bit-adder.kicad_pcb
- Schematic8bit-adder.kicad_sch
8bit adder: common questions
How big is the 8bit adder PCB?
The 8bit adder measures 310 × 110 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 8bit adder?
344 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the 8bit adder design files?
From the Lopfi/8bit-adder repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 8bit adder design in my own project?
Yes, under the terms of its MIT license, which Lopfi chose for the repository.