2 layers390 × 179.8 mm
250407
schenkmi/electronic-retro-computing-projects
In revision 2, the PCB size has been reduced by more than 50% and TAPuino support has been ditched. It now features a Micro SD slot and a few other improvements.
227 parts
2 layers389.2 × 181.8 mm
In revision 2, the PCB size has been reduced by more than 50% and TAPuino support has been ditched. It now features a Micro SD slot and a few other improvements.
- Size
- 389.2 × 181.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 260
- Nets
- 265
- Pads
- 1,304
- Tracks, vias
- 8,552, 617
- Pours
- 100
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 29 Jul 2023
- Updated
- 9 Apr 2025
Overview
C64 is an open-source printed circuit board by schenkmi, from the schenkmi/electronic-retro-computing-projects repository on GitHub. It is a 2-layer board of 389.2 × 181.8 mm with 260 parts on 265 nets, routed with 8,552 tracks and 617 vias.
It is built around the 74LS02PC, 74LS175PC and PN2222A. Its parts include 99 capacitors, 44 resistors, 24 ICs, 7 transistors and 5 connectors.
Main components
3
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
74LS175PC
PDIP-160℃~+70℃ 1 10ns 18mA 25ns@5V,15pF 30MHz 4 4.75V~5.25V 5ns 74LS Series Asynchronous Complementary type D-Type Reset Rising Edge PDIP-16 Flip Flops ROHSTexas InstrumentsFlip Flops
PN2222A
TO-92-3-55℃~+150℃ 1 NPN 1A 300MHz 300mV 40V 625mW NPN TO-92-3 Bipolar (BJT) ROHSNTE ElectronicsBipolar (BJT)
README
SD2IECplug/README.mdSD2IEC Pluggable
- KiCAD project files for my take on a SD2IEC compatible board.
- The schematics are heavily based on the design by Shadowolf.
- The BOM export is included in the repository.
- There should probably be more documentation here, but while it is still missing you may find some additional information on my blog.
- This is all work in progress with absolutely no guarantees. USE AT YOUR OWN RISK!
Revision 2
In revision 2, the PCB size has been reduced by more than 50% and TAPuino support has been ditched. It now features a Micro SD slot and a few other improvements. Note: In this revision, the numbering of the LEDs has been accidentally reversed. This has been fixed later on the master branch.
Revision 1
The first revision required a much larger PCB but featured a full-size SD slot and experimental support for TAPuino functionality. The latter was never tested though and probably wouldn't work.
If you don't intend to use the TAPuino functionality (and there isn't any firmware support for this yet) you can omit R16-R21 and the optocoupler U3. Also, the board can be power either through the USB or the tape port connector so you don't necessarily need to fit both.
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Parts
260| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 0.1 uF | Capacitor:12_03_07 | C1, C2, C3, C16, C18, C22, C30, C31, C32, C35, C39, C45, C46, C47, C55, C56 +12 |
| 18 | FERRITE_BEAD | FERRITE_BEAD:FERRITE_BEAD | FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB10, FB11, FB12, FB13, FB14, FB15, FB16, FB17, FB18 +2 |
| 13 | 10 uF 25V | CAPACITOR_ELECTROLYTIC_2:CAPACITOR_ELECTROLYTIC_2.5_6 | C8, C12, C13, C14, C15, C17, C24, C34, C57, C62, C64, C65, C94 |
| 12 | 0.22 uF | Capacitor:12_03_07 | C25, C26, C27, C28, C40, C41, C42, C43, C50, C53, C59, C92 |
| 11 | 0.47 uF | Capacitor:12_03_07 | C4, C5, C6, C7, C9, C29, C33, C44, C51, C60, C85 |
| 11 | 1 K | Resistor:12_03_07 | R4, R6, R13, R16, R23, R28, R29, R30, R31, R36, R38 |
| 8 | 4164 | 4164:4164 | U9, U10, U11, U12, U21, U22, U23, U24 |
| 6 | 0.22 uF 100V | Capacitor:0203 | C20, C21, C97, C98, C99, C100 |
| 5 | 3.3 K | Resistor:12_03_07 | R1, R24, R43, R44, R45 |
| 5 | PN2222 | TO92:TO92 | Q4, Q5, Q6, Q7, Q8 |
| 4 | 0.47 uF 50V 20% | Capacitor:15_4_10 | C61, C63, C66, C67 |
| 4 | 1.5 K | Resistor:12_03_07 | R2, R5, R15, R22 |
| 3 | Conn_01x01 | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | J1, J2, J3 |
| 2 | 10 K | Resistor:12_03_07 | R3, R7 |
| 2 | 1000 pF | Capacitor Disc:12_03_07 | C48, C93 |
| 2 | 120 | Resistor:12_03_07 | R10, R11 |
| 2 | 1N4001 | D-12_3_7:D-12_3_7 | CR5, CR6 |
| 2 | 2.2 uH | INDUCTOR_P12:12_03_07 | L1, L2 |
| 2 | 220 pF 50V | Capacitor:12_03_07 | C72, C78 |
| 2 | 2200 pF Polyester | polyester12_03_07:polyester12_03_07 | C10, C11 |
| 2 | 2364 | 2364:2364 | U3, U4 |
| 2 | 33 | RESISTOR_PACK_4:RESISTOR_PACK_4 | RP1, RP2 |
| 2 | 390 | Resistor:12_03_07 | R8, R39 |
| 2 | 4066 | 4066:4066 | U16, U28 |
| 2 | 47 K | Resistor:12_03_07 | R33, R34 |
| 2 | 470 pF 50V | Capacitor:12_03_07 | C49, C52 |
| 2 | 470 uF 50V | Capacitor:E37-31.5-17.5-E | C88, C90 |
| 2 | 51 pF | Capacitor:12_03_07 | C38, C80 |
| 2 | 6.8 K | Resistor:12_03_07 | R20, R37 |
| 2 | 6526 | 6526:6526 | U1, U2 |
| 2 | 75 | Resistor:12_03_07 | R9, R26 |
| 2 | CONTROL_PORT | CONTROL_PORT:CONTROL_PORT | CN8, CN9 |
| 2 | SN74257N | SN74257N:SN74257N | U13, U25 |
| 1 | 0 | Resistor:12_03_07 | R42 |
| 1 | 0.1 uF | Capacitor Disc:c101 | C101 |
| 1 | 1 K Trim Pot | POT_METER:POT_METER | R25 |
| 1 | 1 M | Resistor:12_03_07 | R41 |
| 1 | 1.2 K | Resistor:12_03_07 | R17 |
| 1 | 1.2 uH | INDUCTOR_P15:P15 | L5 |
| 1 | 10 pF 5% | Capacitor:12_03_07 | C70 |
| 1 | 100 | Resistor:12_03_07 | R14 |
| 1 | 100 uF 16V | C_E_5-9:C_E_5-9 | C91 |
| 1 | 1000 pF | Capacitor:12_03_07 | C37 |
| 1 | 15 K | Resistor:12_03_07 | R19 |
| 1 | 150 pF 50V | Capacitor:12_03_07 | C73 |
| 1 | 17.73 MHz | Crystal:HC49TL-H | Y1 |
| 1 | 1A | SH32:SH32 | F1 |
| 1 | 1N4371 2.7 V | D-12_3_7:D-12_3_7 | CR1 |
| 1 | 1N914 | D-12_3_7:D-12_3_7 | CR3 |
| 1 | 2 K Trim Pot | POT_METER:POT_METER | R27 |
| 1 | 2.1 K | Resistor:12_03_07 | R46 |
| 1 | 20 pF | Capacitor:12_03_07 | C81 |
| 1 | 20 pF 50V | Capacitor:12_03_07 | C36 |
| 1 | 2114 | 2114:2114 | U6 |
| 1 | 2200 uF 16V | Capacitor:E37-31.5-17.5-E | C19 |
| 1 | 230 | Resistor:12_03_07 | R18 |
| 1 | 2332 | 2332:2332 | U5 |
| 1 | 2N3904 | TO92:TO92 | Q2 |
| 1 | 2N4401 | TO92:TO92 | Q1 |
| 1 | 3 uH | INDUCTOR_P12:12_03_07 | L3 |
| 1 | 3.3 K | RESISTOR_PACK_9:RESISTOR_PACK_9 | RP4 |
| 1 | 3.3 K | RESISTOR_PACK_4:RESISTOR_PACK_4 | RP3 |
| 1 | 33 pF | Capacitor:12_03_07 | C83 |
| 1 | 360 pF | Capacitor:12_03_07 | C23 |
| 1 | 39 pF 50V 5% | Capacitor:12_03_07 | C86 |
| 1 | 4.7 K | Resistor:12_03_07 | R21 |
| 1 | 470 | Resistor:12_03_07 | R49 |
| 1 | 470 K | Resistor:12_03_07 | R35 |
| 1 | 470 pF | Capacitor:12_03_07 | C54 |
| 1 | 510 pF | Capacitor:12_03_07 | C79 |
| 1 | 556DIGITAL | 556DIGITAL:556DIGITAL | U20 |
| 1 | 6510 | 6510:6510 | U7 |
| 1 | 6569 | 6569:6569 | U19 |
| 1 | 6581 | 6581:6581 | U18 |
| 1 | 7.5 V | D-12_3_7:D-12_3_7 | CR2 |
| 1 | 74LS02 | 7402:7402 | U33 |
| 1 | 74LS175 | SN74629:SN74629 | U34 |
| 1 | 7805 | VR:VR | VR2 |
| 1 | 7812 | VR:VR | VR1 |
| 1 | BRIDGE_RECTIFIER | BRIDGE_RECTIFIER:BRIDGE_RECTIFIER | CR4 |
The 215 most common of 260 parts.
Questions
How big is the C64 PCB?
It measures 389.2 × 181.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the C64 use?
260 parts, built around the 74LS02PC, 74LS175PC and PN2222A. 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 C64 KiCad files?
From the schenkmi/electronic-retro-computing-projects repository on GitHub, at the commit this page was made from: the board is 326298-Rev-A-Kicad-master/C64.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the C64 design in my own project?
Its repository states no licence, so its author keeps all rights: ask schenkmi before reusing the design.
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