68000sbc
About the 68000sbc PCB
68000sbc is an open source PCB design by ppsilv, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 127 × 90.8 mm, with 45 components from 28 distinct parts.
Other key parts include the 74HC139, 74HC14, TMP68HC000P-12, AS6C4008-55PCN and 28C256. By type, the board carries 12 capacitors, 8 ICs, 8 resistors, 6 connectors, 6 diodes and 2 crystals.
It belongs with the retro computing designs in this gallery.
From the project
This is my MC68000 first project.
A minimal single-board computer based on the venerable "Texas Cockroach" Motorola 68000 16/32-bit microprocessor.
- 68HC000 processor running at 12MHz - 1MB RAM - 64KB ROM - 16550 UART providing a 5V FTDI serial port - 44-pin IDE connector for CompactFlash card adapter - Connector for SparkFun DS3234 real-time clock - Only two 74HC glue logic chips required
This might be capable of running uClinux, but I haven't tried it!
Main components on the 68000sbc
68000sbc bill of materials (BOM)
45 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC139 | DIP-16_W7.62mm_Socket | U1 |
| 1 | 74HC14 | DIP-14_W7.62mm_Socket | U2 |
| 1 | TMP68HC000P-12 | DIP-64_W22.86mm_Socket | U3 |
| 2 | AS6C4008-55PCN | DIP-32_W15.24mm_Socket | U4, U6 |
| 2 | 28C256 | DIP-28_W15.24mm_Socket | U5, U7 |
| 1 | TL16C550 | DIP-40_W15.24mm_Socket | U8 |
| 1 | 12MHz | Oscillator_DIP-14 | X1 |
| 1 | 12MHz | Oscillator_DIP-8 | X2 |
| 1 | USB_B | USB_B_OST_USB-B1HSxx_Horizontal | J1 |
| 1 | 5V FTDI SERIAL | PinHeader_1x06_P2.54mm_Horizontal | J2 |
| 1 | RTC (SparkFun BOB-10160) | PinHeader_1x07_P2.54mm_Vertical | J3 |
| 1 | CFCARD/IDE | PinHeader_2x22_P2.00mm_Vertical | J4 |
| 1 | EXPANSION (F.Cu) | PadRow_1x25_P2.54mm | J5 |
| 1 | EXPANSION (B.Cu) | PadRow_1x25_P2.54mm | J6 |
| 1 | POWER SELECT | PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | RESET | SW_PUSH_6mm | SW1 |
| 1 | BTN1 | SW_PUSH_6mm | SW2 |
| 2 | 1N5817 | D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2 |
| 1 | POWER | LED_D5.0mm | D3 |
| 1 | LED | LED_D5.0mm | D4 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CARD | LED_D5.0mm | D5 |
| 1 | HALT | LED_D5.0mm | D6 |
| 10 | 0.1uF | C_Rect_L7.0mm_W2.0mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +2 |
| 2 | 10uF | CP_Radial_D5.0mm_P2.50mm | C11, C12 |
| 2 | 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2 |
| 1 | 1k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3 |
| 4 | 1k* | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4, R5, R6, R7 |
| 1 | 10k | R_Array_SIP7 | RN1 |
68000sbc design files
The KiCad project lives in the ppsilv/tcpbox68k repository on GitHub; these links point at the commit this page was built from.
68000sbc: common questions
How big is the 68000sbc PCB?
The 68000sbc measures 127 × 90.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 68000sbc?
45 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the 68000sbc design files?
From the ppsilv/tcpbox68k repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 68000sbc design in my own project?
Yes, under the terms of its GPL-3.0 license, which ppsilv chose for the repository.
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