8-Bit-Computer
About the 8-Bit-Computer PCB
8-Bit-Computer is an open source PCB design by phteven7, published on GitHub. It is a 4-layer board measuring 246.4 × 185.4 mm, with 277 components from 40 distinct parts.
Other key parts include the LM555, 74LS04, 74LS08, 74LS32 and 74LS245. By type, the board carries 104 resistors, 85 diodes, 53 ICs, 24 capacitors, 8 switches and 1 connector.
From the project
A computer built following Ben Eater's Youtube tutorials
Main components on the 8-Bit-Computer
8-Bit-Computer bill of materials (BOM)
277 components, 40 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | LM555 | DIP-8_W7.62mm | U1, U2, U3, U39 |
| 5 | 74LS04 | DIP-14_W7.62mm | U4, U28, U29, U49, U53 |
| 3 | 74LS08 | DIP-14_W7.62mm | U5, U23, U46 |
| 1 | 74LS32 | DIP-14_W7.62mm | U6 |
| 6 | 74LS245 | DIP-20_W7.62mm | U7, U10, U13, U17, U30, U36 |
| 8 | 74LS173 | DIP-16_W7.62mm | U8, U9, U11, U12, U14, U15, U19, U34 |
| 2 | 74LS86 | DIP-14_W7.62mm | U16, U18 |
| 2 | 74LS283 | DIP-16_W7.62mm | U20, U21 |
| 1 | 74LS02 | DIP-14_W7.62mm | U22 |
| 2 | 74189 | DIP-16_W7.62mm | U24, U25 |
| 4 | 74LS157 | DIP-16_W7.62mm | U26, U27, U32, U33 |
| 2 | 74LS00 | DIP-14_W7.62mm | U31, U51 |
| 2 | 74LS161 | DIP-16_W7.62mm | U35, U48 |
| 1 | 74LS76 | DIP-16_W7.62mm | U37 |
| 1 | 74LS139 | DIP-16_W7.62mm | U38 |
| 4 | 7SEGMENT_CC | 7SegmentLED_LTS6760_LTS6780 | U40, U41, U42, U43 |
| 1 | 74LS273 | DIP-20_W7.62mm | U44 |
| 3 | 28C16 | DIP-24_W15.24mm_Socket | U45, U47, U52 |
| 1 | 74LS138 | DIP-16_W7.62mm | U50 |
| 1 | USB_B | USB_B_OST_USB-B1HSxx_Horizontal | J1 |
Show 20 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1M | Potentiometer-5.5mm | RV1 |
| 2 | SW_Push | SW_PUSH_6mm_H5mm | SW1, SW4 |
| 3 | SW_SPDT | DPDT-pushbutton | SW2, SW6, SW7 |
| 1 | SW_DIP_x08 | SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW3 |
| 1 | SW_DIP_x04 | SW_DIP_SPSTx04_Slide_9.78x12.34mm_W7.62mm_P2.54mm | SW5 |
| 1 | Reset | SW_PUSH_6mm_H5mm | SW8 |
| 1 | G*** | BenEater | svg2mod |
| 21 | BLUE | LED_D5.0mm | D1, D26, D27, D28, D29, D58, D59, D60 +13 |
| 44 | RED | LED_D5.0mm | D2, D3, D4, D5, D6, D7, D8, D9 +36 |
| 8 | YELLOW | LED_D5.0mm | D30, D31, D32, D33, D44, D45, D46, D47 |
| 12 | GREEN | LED_D5.0mm | D34, D35, D49, D50, D52, D53, D55, D56 +4 |
| 16 | 0.1µF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C3, C10, C11, C12, C13, C14, C15 +8 |
| 6 | 0.01µF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C2, C4, C5, C7, C8, C9 |
| 1 | 1µF | CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | 10µF | CP_Radial_D5.0mm_P2.00mm | C24 |
| 10 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R5, R6, R58, R63, R64 +2 |
| 1 | 1M | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 83 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R16, R17, R18, R19, R20, R21, R22 +75 |
| 9 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R8, R9, R10, R11, R12, R13, R14, R15 +1 |
| 1 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R66 |
8-Bit-Computer design files
The KiCad project lives in the phteven7/8-Bit-Computer repository on GitHub; these links point at the commit this page was built from.
8-Bit-Computer: common questions
How big is the 8-Bit-Computer PCB?
The 8-Bit-Computer measures 246.4 × 185.4 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the 8-Bit-Computer?
277 components, from 40 distinct parts. The full bill of materials is listed on this page.
Where can I download the 8-Bit-Computer design files?
From the phteven7/8-Bit-Computer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 8-Bit-Computer design in my own project?
The repository has no license, so all rights stay with phteven7. Use it as a reference, and ask the author before reusing the design.