Cbm micropet
About the Cbm micropet PCB
Cbm micropet is an open source PCB design by fachat, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 190.2 × 100.3 mm, with 183 components from 81 distinct parts.
Other key parts include the IS61C5128AS-25QLI, SN74HCT245DWR, SN74HCT00DR, 7486D and SN74LS145N. By type, the board carries 71 capacitors, 37 resistors, 29 ICs, 10 jumpers, 10 diodes and 8 connectors.
It belongs with the retro computing designs in this gallery.
From the project
A small, single-PCB clone of the Commodore PET with all modern parts
Note: this is a part of a larger set of repositories, with upet_family as the main repository.
This is a re-incarnation of the Commodore PET computer(s) from the later 1970s.
It is build on a PCB slightly larger than a Eurocard board and has only parts that can still be obtained new in 2024. The current version is 3.0A
Some more videos on the build process can be found here YT 8-bit times
Main components on the Cbm micropet
Cbm micropet bill of materials (BOM)
183 components, 81 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | IS61C5128AS-25QLI RAMSOCK32TO512KSOP | SOP32 | IC1, IC13 |
| 1 | SN74HCT245DWR 74245DW | SO20W | IC2 |
| 1 | SN74HCT00DR 7400D | SO14 | IC3 |
| 1 | 7486D | SO14 | IC4 |
| 1 | SN74LS145N 74145N | DIL16 | IC5 |
| 1 | SN74LVC125AD 74125D | SO14 | IC6 |
| 1 | 74138D | SO16 | IC7 |
| 1 | MAX3421EEHJ+T MAX3421E | TQFP32-5MM | IC8 |
| 1 | W65C22N6TPLG-14 VIAPLCC | PLCC44 | IC9 |
| 2 | W65C21N6TPLG-14 PIAPLCC | PLCC44 | IC10, IC11 |
| 1 | SN74LVC4245ADW 74LVC8T245SO24 | SO24L | IC16 |
| 1 | LDI1117-3.3H AMS1117-3.3 | SOT-223-3_TabPin2 | U1 |
| 1 | SN74LVC1G04DBVR 74LVC1G04 | SOT-23-5 | U2 |
| 1 | W65C816SPLCC | PLCC44 | U$1 |
| 1 | XC6SLX9-TQG144 | TQFP144 | U$2 |
| 1 | DS1813 | TO92 | U$3 |
| 2 | SPIFLASH | DIL08 | U$4, U$14 |
| 2 | 74LS641 | DIL20 | U$5, U$6 |
| 1 | XILINXPROG | FLAT10BOX | U$7 |
| 1 | JP7 | PinHeader_1x07_P2.54mm_Vertical | U$8 |
Show 61 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ETHOLIENC | ETHOLIENC | U$9 |
| 1 | PETSKEY_EXTRA | JP6 | U$11 |
| 1 | SD-CARD-GRAVI | GRAVITECH-SDCARD | U$12 |
| 1 | MCP79510 | MSOP10 | U$13 |
| 1 | AP2132BB | PSOP-8-FIXED | U$16 |
| 1 | IRLML5203TRPBF IRLML5203 | MICRO3 | Q1 |
| 1 | 830002995B 32kHz | TC26H | Q2 |
| 1 | CYS6Q31C-12.000MHZ 12MHz | HC49_S | Q3 |
| 1 | SJ1-3513N 1503_09 | 1503_09 | X1 |
| 1 | L77HDE15SD1CH4FVGA D-SUB15-HDR15RA | HDR15RA | X2 |
| 1 | PORT_CASSETTE_EDGE | MA156_6-2_KEYED | CN3 |
| 1 | PORT_IEEE_EDGE | MA156_12-2_IEEE | CN4 |
| 1 | KLDX-0202-A DCJ0202 | DCJ0202 | J1 |
| 1 | C64KEYB | C64KEYB | P1 |
| 1 | 61202421621 IEEE488FLATCABLE | FLAT24 | P2 |
| 1 | 61202421621 PETUSERPORT | FLAT24 | P3 |
| 1 | CBMTAPE | JP6 | P6 |
| 1 | PETKEYBD | C64KEYB | P7 |
| 1 | AE-2038E-4WA PIEZOBEEPER | JP2 | BEEP1 |
| 7 | MOUNT-HOLE3.2 | 3,2 | H1, H2, H3, H4, H5, H6, H7 |
| 3 | JP2E | JP2 | JP1, JP6, JP10 |
| 6 | JP1E | JP1 | JP2, JP3, JP4, JP5, JP8, JP9 |
| 1 | JP4E | JP4 | JP7 |
| 1 | XLH536070.000000I RENOSCXLH | RENJS6 | JS1 |
| 1 | B3F-3122 31-XX | B3F-31XX | S1 |
| 1 | MCP4802-E/SN MCP48X2 | SOIC8 | SN1 |
| 1 | 614004190021 USB-A-H | USB-A-H | USB1 |
| 1 | SSL-LX305F4GD LED3MM | LED3MM | LED1 |
| 4 | 1N4148TR 1N4148 | D-5 | D1, D5, D6, D8 |
| 6 | 1N4148TR 1N4148DO35-7 | DO35-7 | D2, D3, D4, D9, D10, D11 |
| 49 | 885012206020 0.1u | C0603 | C1, C2, C3, C4, C12, C13, C14, C15 +41 |
| 1 | 860010372004 47u | E5-8,5 | C5 |
| 1 | 860010372004 47u | E5-6 | C6 |
| 2 | 885012206020 100n | C0603 | C7, C8 |
| 1 | 885012206020 1.0u Cer | C0603 | C9 |
| 2 | 885012206020 1u | C0603 | C10, C11 |
| 1 | 860010372004 47u | E2,5-6 | C26 |
| 4 | 860010372002 22u | E2,5-6 | C28, C36, C37, C38 |
| 4 | C0603C180K4HACTU 18p | C0603 | C29, C30, C39, C40 |
| 4 | 860020672005 1u | C050-025X075 | C49, C50, C51, C52 |
| 2 | CL21A226MPQNNNE 22u | C0805 | C65, C66 |
| 3 | MF1/4LCT52R330J 33 | 0204_7 | R1, R2, R4 |
| 1 | CCF072K40JKE36 2k4 | 0207_2V | R3 |
| 1 | MFR-12FTF52-2K2 2k2 | 0204_5 | R5 |
| 3 | MF0207FTE26-10R 10 | 0207_2V | R6, R20, R21 |
| 2 | MF1/4LCT52R680G 68 | 0204V | R7, R8 |
| 4 | MFR3-10KFC 10k | 0207_2V | R9, R10, R11, R24 |
| 1 | 3k3 | 0204V | R12 |
| 3 | RNF14FTD470R 470 | 0204V | R13, R14, R15 |
| 1 | MFR3-100KFC 100k | 0207_2V | R16 |
| 2 | MFR3-390RFC 390 | 0207_2V | R17, R22 |
| 2 | MFR-12FTF52-100R 100 | 0204V | R18, R31 |
| 1 | 470 | 0204V | R19 |
| 1 | MFR-12FTF52-3K3 3k3 | 0204_5 | R23 |
| 1 | MFR-12FTF52-4K7 4k7 | 0207_2V | R25 |
| 3 | MFR-12FTF52-1K 1k | 0204V | R26, R27, R28 |
| 1 | MFR-12FTF52-330R 330 | 0207_2V | R29 |
| 2 | MFR-12FTF52-680R 680 | 0204V | R30, R32 |
| 1 | 4609X-101-103LF 10k | RN-9 | RN1 |
| 2 | 4609X-101-222LF 2k4 | RN-9 | RN2, RN4 |
| 2 | 4609X-101-512LF 5k1 | RN-9 | RN3, RN5 |
Cbm micropet design files
The KiCad project lives in the fachat/cbm_micropet repository on GitHub; these links point at the commit this page was built from.
Cbm micropet: common questions
How big is the Cbm micropet PCB?
The Cbm micropet measures 190.2 × 100.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Cbm micropet?
183 components, from 81 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Cbm micropet design files?
From the fachat/cbm_micropet repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Cbm micropet design in my own project?
Yes, under the terms of its GPL-3.0 license, which fachat chose for the repository.
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