2 layers154.9 × 139.7 mm
68kBoard
transistorfet/computie
A collection of 68k computer projects, including a unix-like operating system written in C that runs on them
78 parts69GPL-3.0
2 layers147.3 × 100.3 mm
Mini68k
seventhoctave/mini68k13mc68008 SBC
- Size
- 147.3 × 100.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 41
- Nets
- 100
- Pads
- 318
- Tracks, vias
- 1,028, 80
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 12 Jun 2018
- Updated
- 29 Jul 2020
Overview
Mini68k is an open-source printed circuit board by seventhoctave, from the seventhoctave/mini68k repository on GitHub. It is a 2-layer board of 147.3 × 100.3 mm with 41 parts on 100 nets, routed with 1,028 tracks and 80 vias.
It is built around the 74LS05P-E, HM62256BLP-7 and L7805, with the MAX708CPA+ among its other parts. Its parts include 11 capacitors, 8 ICs, 5 connectors, 2 diodes and 2 switches. It belongs with the computers and single-board computers and retro computing and games boards and the FPGA and CPLD boards of this library.
Main components
474LS05P-E
-- Inverters ROHSRenesas ElectronicsLogic Gates
HM62256BLP-7
DIP28DIP28 New Arrivals ROHSHITUncategorised
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MAX708CPA+
PDIP-80℃~+70℃@(TA) 1 140ms 4.4V Active High、Active Low Push-pull Simple Reset/Power-On Reset PDIP-8 Supervisor and Reset ICs ROHSMaxim Integrated (Analog Devices)Supervisor And Reset ICs
README
README.mdParts
41| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | .1u | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C3, C4, C5, C6, C7, C8, C9 |
| 2 | Jumper | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1, JP2 |
| 2 | Jumper_3_Open | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP3, JP4 |
| 1 | 6-bit input port | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J2 |
| 1 | 8-bit output port | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Horizontal | J3 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 10uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C2 |
| 1 | 15pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C11 |
| 1 | 1k | Resistor_THT:R_Array_SIP7 | RN1 |
| 1 | 28C256/27C256 | Package_DIP:DIP-28_W15.24mm_LongPads | U4 |
| 1 | 3.6864 Mhz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 330R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 5pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C10 |
| 1 | 68008D | Package_DIP:DIP-48_W15.24mm_LongPads | U2 |
| 1 | 68681 | Package_DIP:DIP-40_W15.24mm_LongPads | U7 |
| 1 | 74LS05 | Package_DIP:DIP-14_W7.62mm_LongPads | U8 |
| 1 | 8 Mhz | Oscillator:Oscillator_DIP-14_LargePads | X1 |
| 1 | D_ALT | Diode_THT:D_DO-35_SOD27_P10.16mm_Horizontal | D1 |
| 1 | FTDI header COM1 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J4 |
| 1 | FTDI header COM2 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J5 |
| 1 | GAL16V8 | Package_DIP:DIP-20_W7.62mm_LongPads | U5 |
| 1 | HM62256BLP-7 | Package_DIP:DIP-28_W15.24mm_LongPads | U1 |
| 1 | Jack-DC | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | Jumper | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | JP5 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | U3 |
| 1 | MAX708CPA+ | Package_DIP:DIP-8_W7.62mm_LongPads | U6 |
| 1 | RED | LED_THT:LED_D4.0mm | D2 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW2 |
| 1 | SW_SPDT | Button_Switch_THT:SW_E-Switch_EG1271_DPDT | SW1 |
The 37 most common of 41 parts.
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Questions
How big is the Mini68k PCB?
It measures 147.3 × 100.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mini68k use?
41 parts, built around the 74LS05P-E, HM62256BLP-7, L7805 and MAX708CPA+. 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 Mini68k KiCad files?
From the seventhoctave/mini68k repository on GitHub, at the commit this page was made from: the board is hw/mini68k/mini68k.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mini68k design in my own project?
Its repository states no licence, so its author keeps all rights: ask seventhoctave before reusing the design.