2 layers120.6 × 47 mm
2 layers297 × 75 mm
Sysbus
rcapaverde/cuboArquitetura de processador conceitual
- Size
- 297 × 75 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 190
- Pads
- 502
- Tracks, vias
- 1,285, 165
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Dec 2025
- Updated
- 24 Aug 2026
Overview
Sysbus is an open-source printed circuit board by rcapaverde, from the rcapaverde/cubo repository on GitHub. It is a 2-layer board of 297 × 75 mm with 63 parts on 190 nets, routed with 1,285 tracks and 165 vias.
It is built around the LM7805, NE555P and BC548. Its parts include 20 ICs, 15 connectors, 14 capacitors, 8 resistors and 2 diodes.
Main components
3
LM7805
TO-2630℃~+125℃ 1 1A 20V 2V 42uV 5V 62dB@(120Hz) 8mA Fixed Over Temperature Protection、Short Circuit Protection Positive TO-263 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSYONGYUTAIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
BC548
TO-92TO-92 Bipolar (BJT) ROHSDDFBipolar (BJT)
README
README.mdcubo - um processador conceitual
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C1, C3, C6, C8, C10, C13, C21, C31 |
| 8 | MC14495P | Package_DIP:DIP-16_W7.62mm | U1, U3, U6, U8, U10, U13, U21, U31 |
| 4 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R16, R21, R22 |
| 3 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C4, C5, C12 |
| 3 | 470R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R12, R20 |
| 2 | BC548 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2 |
| 1 | 0.1uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C14 |
| 1 | 0.33uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C11 |
| 1 | 10K | Resistor_THT:R_Array_SIP9 | RN1 |
| 1 | 10nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C22 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R23 |
| 1 | 1N4001 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D32 |
| 1 | 9V 1A | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J19 |
| 1 | ADDR N0 | Display_7Segment:Sx39-1xxxxx | U9 |
| 1 | ADDR N1 | Display_7Segment:Sx39-1xxxxx | U11 |
| 1 | ADDR N2 | Display_7Segment:Sx39-1xxxxx | U4 |
| 1 | ADDR N3 | Display_7Segment:Sx39-1xxxxx | U2 |
| 1 | AMPS | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J21 |
| 1 | DATA N0 | Display_7Segment:Sx39-1xxxxx | U12 |
| 1 | DATA N1 | Display_7Segment:Sx39-1xxxxx | U7 |
| 1 | LM7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U34 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U5 |
| 1 | PWR | LED_THT:LED_D5.0mm | D1 |
| 1 | RDADDR_HIGH | Display_7Segment:Sx39-1xxxxx | U17 |
| 1 | RDADDR_LOW | Display_7Segment:Sx39-1xxxxx | U14 |
| 1 | RESET | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | SW1 |
| 1 | VOLTS | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J20 |
| 1 | WRADDR_HIGH | Display_7Segment:Sx39-1xxxxx | U22 |
| 1 | WRADDR_LOW | Display_7Segment:Sx39-1xxxxx | U23 |
| 1 | bus clock | edge_connector:conector 02x08 | J26 |
| 1 | bus clu 1 | edge_connector:conector 02x08 | J7 |
| 1 | bus clu 2 | edge_connector:conector 02x08 | J11 |
| 1 | bus clu 3 | edge_connector:conector 02x08 | J12 |
| 1 | bus ioc 1 | edge_connector:conector 02x08 | J23 |
| 1 | bus ioc 3 | edge_connector:conector 02x08 | J24 |
| 1 | bus mem 1 | edge_connector:conector 02x08 | J5 |
| 1 | bus mem 2 | edge_connector:conector 02x08 | J6 |
| 1 | bus rf16 1 | edge_connector:conector 02x08 | J3 |
| 1 | bus rf16 2 | edge_connector:conector 02x08 | J4 |
| 1 | bus ula 1 | edge_connector:conector 02x08 | J2 |
| 1 | bus ula 2 | edge_connector:conector 02x08 | J1 |
Questions
How big is the Sysbus PCB?
It measures 297 × 75 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sysbus use?
63 parts, built around the LM7805, NE555P and BC548. 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 Sysbus KiCad files?
From the rcapaverde/cubo repository on GitHub, at the commit this page was made from: the board is pcb_v3/sysbus/sysbus.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sysbus design in my own project?
Its repository states no licence, so its author keeps all rights: ask rcapaverde before reusing the design.
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