2 layers357.8 × 124.5 mm
Vic2020mainboard
danwerner21/vic2020
A Vic-20 clone created with [almost] all readily available parts
142 parts78
2 layers382.1 × 136.2 mm
Commodore Vic-20
jimbro1000/Commodore-Vic-206Late, cost reduced vic-20 schematic and board
- Size
- 382.1 × 136.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 142
- Nets
- 207
- Pads
- 920
- Tracks, vias
- 4,040, 354
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 15 Mar 2023
- Updated
- 10 Aug 2024
Overview
Commodore Vic-20 is an open-source printed circuit board by jimbro1000, from the jimbro1000/Commodore-Vic-20 repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 382.1 × 136.2 mm with 142 parts on 207 nets, routed with 4,040 tracks and 354 vias.
It is built around the 74LS245SC, 2SC1815 and 74LS02PC, with the 2SC1959Y, 2SD880 and 74LS04PC among its other parts. Its parts include 47 capacitors, 30 resistors, 9 connectors, 4 transistors and 3 ICs. It belongs with the retro computing and games boards of this library.
Main components
774LS245SC
-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, Transceivers
2SC1815
SOT-23-55℃~+150℃ 1 NPN 100nA 130 150mA 200mW 250mV 50V 5V 80MHz NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
74LS02PC
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 Gates
2SC1959Y
TO-92Bipolar (BJT)LGE
2SD880
TO-220Bipolar (BJT)Foshan Blue Rocket Elec74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
74LS133PC
PDIP-160℃~+70℃ 1 1.1mA 4.75V~5.25V 74LS Series NAND Gate PDIP-16 Logic Gates ROHSTexas InstrumentsLogic Gates
README
README.mdCommodore VIC-20 Schematic and PCB for assembly 250403
This repository contains KiCad schematics and "rough" PCB layout for the cost reduced VIC-20, assembly #250403.
Originally hard forked from https://github.com/StormTrooper/Commodore-Vic-20 (this does not appear to be maintained).
The schematic for the Commodore VIC-20 (251027-01 Rev D) was taken from the schematics on zimmers.net with extra detail from the "Vic-20 friendly computer technical manual" and converted into KiCad (Version 8).
Additionally includes some KiCad footprints and symbols for the custom components.
State
The schematics are complete and 95% of the PCB layout is done but it is not complete. The power supply section of the board is mostly unfinished, and accurate footprints for the large inductor, power switch and bridge rectifier are needed.
Notes
This is a WIP as the documentation and detail on the actual PCB are far from clear and require some deciphering.
The power management section of the board in particular is unfinished.
The PCB design, while true to the original, is not intended for fabrication. Instead the board has been reconstructed for the purpose of diagnosing faults on original Commodore boards. The overall board dimensions are accurate but the positioning of the different ports are approximations based on the rather distorted board scans in the technical manual.
KiCad thumbnail of schematic and pcb
Parts
142| Qty | Value | Footprint | References |
|---|---|---|---|
| 27 | 100n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C3, C10, C12, C16, C18, C22, C23, C24, C25, C26, C27, C28, C29, C30 +11 |
| 12 | Ferrite_Bead_Small | Inductor_THT:L_Axial_L7.0mm_D3.3mm_P12.70mm_Horizontal_Fastron_MICC | FB1, FB2, FB3, FB6, FB10, FB11, FB12, FB13, FB14, FB15, FB16, FB17 |
| 6 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R15, R20, R22, R26, R29 |
| 4 | Ferrite_Bead_Small | Inductor_THT:L_Axial_L7.0mm_D3.3mm_P5.08mm_Vertical_Fastron_MICC | FB4, FB5, FB7, FB9 |
| 3 | 10n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C20, C21, C43 |
| 3 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R17, R18, R19 |
| 3 | 2114 | Package_DIP:DIP-18_W7.62mm | UD2, UE1, UE2 |
| 3 | 220n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C31, C32, C34 |
| 3 | 2K2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3 |
| 3 | 74LS138 | Package_DIP:DIP-16_W7.62mm | UC4, UC5, UC6 |
| 3 | 74LS245 | Package_DIP:DIP-20_W7.62mm | UD8, UE8, UF8 |
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16, R21 |
| 2 | 10u | Commodore:CP_Radial_D5.0mm_P5.0mm | C15, C42 |
| 2 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R8, R40 |
| 2 | 2364 | Package_DIP:DIP-24_W15.24mm | UE11, UE12 |
| 2 | 2SC1815 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1, Q3 |
| 2 | 2u2 | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C4, C7 |
| 2 | 330R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R5, R6 |
| 2 | 560R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R7, R28 |
| 2 | 6522 | Package_DIP:DIP-40_W15.24mm | UAB1, UAB3 |
| 2 | 74LS02 | Package_DIP:DIP-14_W7.62mm | UB9, UC3 |
| 2 | M58725 | Package_DIP:DIP-24_W15.24mm | U14, U15 |
| 1 | 100u | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C33 |
| 1 | 14.31818 | Crystal:Crystal_HC18-U_Vertical | Y1 |
| 1 | 150k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R25 |
| 1 | 15P | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C50 |
| 1 | 180R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R14 |
| 1 | 1A | Fuse:Fuseholder_Cylinder-5x20mm_Stelvio-Kontek_PTF78_Horizontal_Open | F1 |
| 1 | 1k8 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R11 |
| 1 | 1m5 | Diode_THT:Diode_Bridge_15.2x15.2x6.3mm_P10.9mm | L4 |
| 1 | 1u | Commodore:CP_Radial_D5.0mm_P5.0mm | C11 |
| 1 | 20P | Varistor:RV_Disc_D7mm_W3.4mm_P5mm | C48 |
| 1 | 220k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R24 |
| 1 | 220n | Capacitor_THT:C_Rect_L11.0mm_W2.8mm_P10.00mm_MKT | C36 |
| 1 | 220p | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C13 |
| 1 | 220u | Capacitor_THT:CP_Axial_L38.0mm_D21.0mm_P44.00mm_Horizontal | C39 |
| 1 | 2332 | Package_DIP:DIP-24_W15.24mm | UD7 |
| 1 | 240 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R41 |
| 1 | 270R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R13 |
| 1 | 27k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R12 |
| 1 | 2SC1959 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q2 |
| 1 | 2SD880 | Package_TO_SOT_THT:TO-220-3_Vertical | Q4 |
| 1 | 2u | Inductor_THT:L_Axial_L9.5mm_D4.0mm_P15.24mm_Horizontal_Fastron_SMCC | L3 |
| 1 | 2u2 | Inductor_THT:L_Axial_L6.6mm_D2.7mm_P10.16mm_Horizontal_Vishay_IM-2 | L1 |
| 1 | 390R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R23 |
| 1 | 4066 | Package_DIP:DIP-14_W7.62mm | UD1 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R27 |
| 1 | 470n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C5 |
| 1 | 470n | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C6 |
| 1 | 47u | Commodore:CP_Radial_D5.0mm_P5.0mm | C14 |
| 1 | 510R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R9 |
| 1 | 6502 | Package_DIP:DIP-40_W15.24mm | UE10 |
| 1 | 6560 | Package_DIP:DIP-40_W15.24mm | UB7 |
| 1 | 6v8 | Diode_THT:D_DO-34_SOD68_P10.16mm_Horizontal | CR1 |
| 1 | 74LS04 | Package_DIP:DIP-14_W7.62mm | UC2 |
| 1 | 74LS06 | Package_DIP:DIP-14_W7.62mm | UB4 |
| 1 | 74LS08 | Package_DIP:DIP-14_W7.62mm | U13 |
| 1 | 74LS133 | Package_DIP:DIP-16_W7.62mm | UD9 |
| 1 | Audio / Video | Commodore:DIN-5 | P4 |
| 1 | CONN_Cassette | Commodore:VC20_CASSETTE | P2 |
| 1 | Conn_01x03_Female | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | CN1 |
| 1 | Controller Port | Connector_Dsub:DSUB-9_Male_Horizontal_P2.77x2.54mm_EdgePinOffset9.40mm | P5 |
| 1 | DBA10B | Diode_THT:Diode_Bridge_Vishay_KBPM | CR2 |
| 1 | Expansion Port | Commodore:VC20_EXPANSIONPORT | P6 |
| 1 | Keyboard | Connector_PinHeader_2.54mm:PinHeader_1x21_P2.54mm_Vertical | P10 |
| 1 | LM555 | Package_DIP:DIP-8_W7.62mm | UB6 |
| 1 | POWER | Commodore:DIN-7 | P7 |
| 1 | SERIAL | Commodore:DIN-6 | P3 |
| 1 | SW_DPST | Commodore:RockerSwitch_CuK_DPDT_E201J1AV2 | SW1 |
| 1 | User Port | Commodore:VC20_USERPORT | P1 |
| 1 | power | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | JP1 |
| 1 | user | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | JP2 |
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Questions
How big is the Commodore Vic-20 PCB?
It measures 382.1 × 136.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Commodore Vic-20 use?
142 parts, built around the 74LS245SC, 2SC1815, 74LS02PC and 2SC1959Y. 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 Commodore Vic-20 KiCad files?
From the jimbro1000/Commodore-Vic-20 repository on GitHub, at the commit this page was made from: the board is Commodore-Vic-20.kicad_pcb and its schematic Commodore-Vic-20.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Commodore Vic-20 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).