2bit cpu
About the 2bit cpu PCB
2bit cpu is an open source PCB design by naoto64, published on GitHub under the MIT license. It is a 2-layer board measuring 80 × 75 mm, with 35 components from 15 distinct parts.
Other key parts include the CD74HC283, 74HC153, 74HC32, 74HC14 and 74HC138. By type, the board carries 10 capacitors, 9 ICs, 8 LEDs, 4 resistors, 3 connectors and 1 fuse.
From the project
2bit CPU using 74HC series logic IC.
Main components on the 2bit cpu
2bit cpu bill of materials (BOM)
35 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CD74HC283 | DIP-16_W7.62mm_Socket | U1 |
| 1 | 74HC153 | DIP-16_W7.62mm_Socket | U2 |
| 1 | 74HC32 | DIP-14_W7.62mm_Socket | U3 |
| 1 | 74HC14 | DIP-14_W7.62mm_Socket | U4 |
| 1 | 74HC138 | DIP-16_W7.62mm_Socket | U5 |
| 1 | 74HC74 | DIP-14_W7.62mm_Socket | U6 |
| 3 | CD74HC161 | DIP-16_W7.62mm_Socket | U7, U8, U9 |
| 1 | USB_Type_C | USB_C_PowerOnly | J1 |
| 1 | Conn_01x08 | PinHeader_1x10_P2.54mm_Vertical | J2 |
| 1 | Conn_01x02 | PinHeader_1x06_P2.54mm_Vertical | J3 |
| 1 | 100mA | Fuse_Bourns_MF-RG300 | F1 |
| 8 | LED | LED_D5.0mm | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 |
| 10 | 0.1u | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +2 |
| 3 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3 |
| 1 | 1k | R_Array_SIP9 | RN1 |
2bit cpu design files
The KiCad project lives in the naoto64/2bit-CPU repository on GitHub; these links point at the commit this page was built from.
- Layout2bit-cpu/2bit-cpu.kicad_pcb
- Schematic2bit-cpu/2bit-cpu.kicad_sch
2bit cpu: common questions
How big is the 2bit cpu PCB?
The 2bit cpu measures 80 × 75 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 2bit cpu?
35 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the 2bit cpu design files?
From the naoto64/2bit-CPU repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 2bit cpu design in my own project?
Yes, under the terms of its MIT license, which naoto64 chose for the repository.
