2 layers370.8 × 298.5 mm
8 Bit Computer
The-Invent0r/8-bit-Computer-PCB
These are the KiCAD files for my 8-Bit Computer.
323 parts142
4 layers388.6 × 212.1 mm
8bit computer
CCYD/8bbbc8-Bit Breadboard Computer based on Ben Eater's design.
- Size
- 388.6 × 212.1 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 298
- Nets
- 410
- Pads
- 1,737
- Tracks, vias
- 5,115, 823
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 29 Apr 2023
- Updated
- 27 Dec 2024
Overview
8bit computer is an open-source printed circuit board by CCYD, from the CCYD/8bbbc repository on GitHub. It is a 4-layer board of 388.6 × 212.1 mm with 298 parts on 410 nets, routed with 5,115 tracks and 823 vias.
It is built around the 74LS245SC, 74LS173SC and 74LS157PC, with the 74LS04PC, NE555P and 74LS00SC among its other parts. Its parts include 93 diodes, 70 capacitors, 60 ICs, 40 resistors and 8 switches. It belongs with the retro computing and games boards of this library.
Main components
1174LS245SC
-0℃~+70℃ 12ns@5V,45pF 15mA 24mA 4.75V~5.25V 74LS 8 Bidirectional Output enable Schmitt trigger Tri-State - Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers74LS173SC
CDIP-160℃~+70℃ 10ns 10ns 28mA 30MHz 4 4.75V~5.25V 40ns@5V,15pF 74LS Series Asynchronous D-Type Reset Rising Edge Tri-State CDIP-16 Flip FlopsTexas InstrumentsFlip Flops
74LS157PC
PDIP-160℃~+70℃ 4.75V~5.25V Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
74LS00SC
-0℃~+70℃ 15ns@5V,50pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA NAND Gate - Logic Gates ROHSTexas InstrumentsLogic Gates
74LS161DC
-0℃~+70℃ 14ns 32MHz 4 4.75V~5.25V 74LS 93mW Asynchronous Binary Counter Programmable divide ratio、Reset function、Cascade counter、Synchronous counting Rising Edge Synchronous - Counters, DividersTexas InstrumentsCounters, Dividers74LS86
DIP-14-20℃~+75℃ 10mA 2.7V 23ns@5V,15pF 2V 400mV 400uA 5V 74LS 800mV 8mA XOR Gate DIP-14 Logic Gates ROHSHITLogic Gates74LS02PC
DIP-140℃~+70℃ 15ns@5V,15pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA 8mA NOR Gate DIP-14 Logic Gates ROHSonsemiLogic Gates74LS139PC
PDIP-1622ns 74LS 8mA Decoder Single Supply PDIP-16 Signal Switches, Multiplexers, DecodersonsemiSignal Switches, Multiplexers, Decoders
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
README
README.mdParts
298| Qty | Value | Footprint | References |
|---|---|---|---|
| 85 | LED | LED_THT:LED_D5.0mm | D1, D2, D10, D11, D12, D13, D14, D17, D18, D19, D20, D21, D22, D23, D24, D25 +69 |
| 63 | 0.1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24 +47 |
| 21 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R5, R10, R31, R36, R37, R50, R59, R60, R61, R62, R63, R64, R65, R66, R85 +5 |
| 11 | R_Network08_US | Resistor_THT:R_Array_SIP9 | RN1, RN2, RN3, RN4, RN5, RN6, RN7, RN8, RN9, RN10, RN11 |
| 10 | 74LS173 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U7, U25, U26, U35, U36, U37, U39, U46, U57, U58 |
| 7 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3, R4, R9, R16, R17, R35 |
| 7 | 74LS157 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U8, U9, U15, U16, U17, U18, U19 |
| 6 | 74LS245 | Package_DIP:DIP-20_W7.62mm_Socket_LongPads | U14, U27, U32, U34, U38, U47 |
| 6 | MountingHole_Pad | MountingHole:MountingHole_2.7mm_M2.5_DIN965_Pad | H1, H2, H3, H4, H5, H6 |
| 5 | 74LS04 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U4, U12, U13, U30, U31 |
| 5 | Yellow | LED_THT:LED_D5.0mm | D16, D65, D66, D67, D68 |
| 4 | D168K | Display_7Segment:D1X8K | U48, U49, U50, U51 |
| 4 | NE555P | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U1, U2, U3, U52 |
| 4 | R_Network04_US | Resistor_THT:R_Array_SIP5 | RN12, RN13, RN14, RN15 |
| 3 | 74LS08 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U5, U45, U56 |
| 3 | AT28C16-15PI | SamacSys_Parts:DIP1550W56P254L3190H559Q24N | IC1, IC2, IC3 |
| 3 | SW_DPDT_x2_Mine | Button_Switch_THT:SW_Push_2P2T_Toggle_CK_PVA2xxH1xxxxxxV2 | SW4, SW5, SW9 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH-12mm | SW1, SW6, SW7 |
| 3 | ~ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R18, R32, R94 |
| 2 | .01u | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C49, C50 |
| 2 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R8 |
| 2 | 1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C4 |
| 2 | 4.7u | Capacitor_THT:CP_Radial_D8.0mm_P2.50mm | C58, C59 |
| 2 | 5.1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R92, R93 |
| 2 | 74F189PC | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U10, U11 |
| 2 | 74LS00 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U23, U24 |
| 2 | 74LS161 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U28, U33 |
| 2 | 74LS283 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U40, U41 |
| 2 | 74LS595 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U20, U21 |
| 2 | 74LS86 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U42, U43 |
| 2 | R_US | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R33, R34 |
| 1 | 120R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R15 |
| 1 | 1M | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV1 |
| 1 | 1u | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C62 |
| 1 | 20K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R88 |
| 1 | 470K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 5817 | Diode_THT:D_A-405_P7.62mm_Horizontal | D15 |
| 1 | 74LS02 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U44 |
| 1 | 74LS107 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U53 |
| 1 | 74LS138 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U29 |
| 1 | 74LS139 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U55 |
| 1 | 74LS32 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U6 |
| 1 | Green | LED_THT:LED_D5.0mm | D5 |
| 1 | Jumper_2_Open | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | Red | LED_THT:LED_D5.0mm | D6 |
| 1 | SW_DIP_x04 | Package_DIP:DIP-8_W7.62mm_LongPads | SW3 |
| 1 | SW_DIP_x08 | Package_DIP:DIP-16_W7.62mm_LongPads | SW2 |
| 1 | USB_C_Receptacle_PowerOnly_6P | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J1 |
| 1 | ~ | Yuri_Library:NodeMCU_v1.0 | U22 |
The 295 most common of 298 parts.
Questions
How big is the 8bit computer PCB?
It measures 388.6 × 212.1 mm and has 4 copper layers, 1.6 mm thick.
What parts does the 8bit computer use?
298 parts, built around the 74LS245SC, 74LS173SC, 74LS157PC and 74LS04PC. 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 8bit computer KiCad files?
From the CCYD/8bbbc repository on GitHub, at the commit this page was made from: the board is KiCad project/8bit-computer/8bit-computer.kicad_pcb and its schematic KiCad project/8bit-computer/8bit-computer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 8bit computer design in my own project?
Its repository states no licence, so its author keeps all rights: ask CCYD before reusing the design.
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