2 layers120.6 × 47 mm
2 layers126.3 × 210 mm
Ula8a
rcapaverde/cuboArquitetura de processador conceitual
- Size
- 126.3 × 210 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 81
- Nets
- 194
- Pads
- 753
- Tracks, vias
- 2,443, 206
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Dec 2025
- Updated
- 24 Aug 2026
Overview
Ula8a is an open-source printed circuit board by rcapaverde, from the rcapaverde/cubo repository on GitHub. It is a 2-layer board of 126.3 × 210 mm with 81 parts on 194 nets, routed with 2,443 tracks and 206 vias.
It is built around the 74LS86, 74LS00SC and 74LS574N, with the 74LS04PC, SA39-11EWA and BC548 among its other parts. Its parts include 20 diodes, 19 ICs, 18 capacitors, 14 resistors and 9 connectors.
Main components
6
74LS86
DIP-14-20℃~+75℃ 10mA 2.7V 23ns@5V,15pF 2V 400mV 400uA 5V 74LS 800mV 8mA XOR Gate DIP-14 Logic Gates ROHSHITLogic Gates
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 Gates74LS574N
-0ns 0℃~+70℃ 1 2.6mA 20ns 24mA 28ns@5V,45pF 35MHz 4.75V~5.25V 74LS Series 8 D-Type Rising Edge Tri-State - Flip Flops ROHSRochester Electronics, LLCFlip Flops74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
SA39-11EWA
DIP-100.39 1 13mmx10mmx7mm 7 Segment 75mW Common Anode Red DIP-10 LED Segment Displays ROHSKingbrightLED Segment Displays
BC548
TO-92TO-92 Bipolar (BJT) ROHSDDFBipolar (BJT)
README
README.mdcubo - um processador conceitual
Parts
81| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 100nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C10, C11, C12, C13, C14, C15, C17, C21, C22 +2 |
| 12 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20 |
| 8 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 |
| 7 | 74LS86 | Package_DIP:DIP-14_W7.62mm | U1, U2, U3, U4, U6, U7, U11 |
| 6 | operador | edge_connector:male-edge-connector-44 | J2, J3, J4, J5, J6, J7 |
| 5 | 74LS244 | Package_DIP:DIP-20_W7.62mm | U5, U10, U12, U17, U21 |
| 2 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 74LS00 | Package_DIP:DIP-14_W7.62mm | U9, U14 |
| 2 | 74LS574 | Package_DIP:DIP-20_W7.62mm | U8, U13 |
| 1 | 74LS04 | Package_DIP:DIP-14_W7.62mm | U22 |
| 1 | BC548 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | CARRY | LED_THT:LED_D5.0mm | D17 |
| 1 | INT | LED_THT:LED_D5.0mm | D14 |
| 1 | LOWER | LED_THT:LED_D5.0mm | D11 |
| 1 | MC14495P | Package_DIP:DIP-16_W7.62mm | U15 |
| 1 | NEG | LED_THT:LED_D5.0mm | D15 |
| 1 | OVF | LED_THT:LED_D5.0mm | D16 |
| 1 | POWER | LED_THT:LED_D5.0mm | D9 |
| 1 | SA39-11EWA | 7segdisplay:1-digit-13mm | U16 |
| 1 | ULA | LED_THT:LED_D5.0mm | D12 |
| 1 | ULA SEL | LED_THT:LED_D5.0mm | D10 |
| 1 | UPPER | LED_THT:LED_D5.0mm | D13 |
| 1 | WACC | LED_THT:LED_D5.0mm | D20 |
| 1 | WPSW | LED_THT:LED_D5.0mm | D19 |
| 1 | ZERO | LED_THT:LED_D5.0mm | D18 |
| 1 | bus_mgrf_1 | edge_connector:conector 02x08 | J8 |
| 1 | bus_mgrf_2 | edge_connector:conector 02x08 | J9 |
| 1 | designador | edge_connector:male-edge-connector-44 | J1 |
Questions
How big is the Ula8a PCB?
It measures 126.3 × 210 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ula8a use?
81 parts, built around the 74LS86, 74LS00SC, 74LS574N 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 Ula8a KiCad files?
From the rcapaverde/cubo repository on GitHub, at the commit this page was made from: the board is pcb_v2/ula8a/ula8a.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ula8a 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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