Z80CTCDART2
About the Z80CTCDART2 PCB
Z80CTCDART2 is an open source PCB design by lynchaj, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 73 components from 39 distinct parts.
Other key parts include the 74LS20, 74LS241, 74LS245, 74LS14 and 74LS08. By type, the board carries 26 capacitors, 16 ICs, 10 resistors, 8 connectors, 5 crystals and 5 switches.
It belongs with the retro computing designs in this gallery.
From the project
Modular Backplane Computer
Adds CTC system timer and DART dual serial ports
External interrupts with Zilog compatible interrupt priority modes
Fully configurable CTC settings for multiple timers and system ticks
Uses built in 4.9152 MHz clock or system CPU clock
Clock dividers for system ticker at selected tick frequencies
Dual RS-232 level serial ports plus dual TTL level serial ports for USB adapters
Main components on the Z80CTCDART2
Z80CTCDART2 bill of materials (BOM)
73 components, 39 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS20 | DIP-14_W7.62mm | U1 |
| 2 | 74LS241 | DIP-20_W7.62mm | U2, U4 |
| 1 | 74LS245 | DIP-20_W7.62mm | U3 |
| 1 | 74LS14 | DIP-14_W7.62mm | U5 |
| 1 | 74LS08 | DIP-14_W7.62mm | U6 |
| 1 | Z80-CTC | DIP-28_W15.24mm | U7 |
| 1 | 4.9152 MHz | DIP-14_W7.62mm | U8 |
| 1 | Z80-DART | DIP-40_W15.24mm | U9 |
| 2 | MAX232 | DIP-16_W7.62mm | U10, U11 |
| 1 | 74LS393 | DIP-14_W7.62mm | U12 |
| 1 | 74LS09 | DIP-14_W7.62mm | U13 |
| 1 | 74LS04 | DIP-14_W7.62mm | U15 |
| 1 | 74LS32 | DIP-14_W7.62mm | U16 |
| 1 | 74LS138 | DIP-16_W7.62mm | U17 |
| 1 | RS-232 B | PinHeader_2x05_P2.54mm_Horizontal | X3 |
| 1 | DART-CTC_TTL | PinHeader_2x13_P2.54mm_Vertical | X4 |
| 1 | OSC_DIV | PinHeader_2x08_P2.54mm_Vertical | X5 |
| 1 | BAUD_CLK | PinHeader_2x05_P2.54mm_Vertical | X6 |
| 1 | RS-232 A | PinHeader_2x05_P2.54mm_Horizontal | X7 |
| 1 | INT SEL | PinHeader_1x03_P2.54mm_Horizontal | J1 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TTLSERPWR | PinHeader_2x02_P2.54mm_Vertical | J2 |
| 1 | TTL SERIAL | PinHeader_2x06_P2.54mm_Horizontal | J4 |
| 1 | SPARES | PinHeader_2x05_P2.54mm_Vertical | P1 |
| 1 | Z80 BUS BACKPLANE | PinHeader_2x25_P2.54mm_Horizontal | P2 |
| 1 | DAISY CHAIN | PinHeader_1x04_P2.54mm_Vertical | P3 |
| 1 | TIMER2 | PinHeader_1x02_P2.54mm_Vertical | P4 |
| 1 | TIMER3 | PinHeader_1x02_P2.54mm_Vertical | P10 |
| 1 | A7 | PinHeader_1x03_P2.54mm_Vertical | SW1 |
| 1 | A6 | PinHeader_1x03_P2.54mm_Vertical | SW2 |
| 1 | A5 | PinHeader_1x03_P2.54mm_Vertical | SW3 |
| 1 | A4 | PinHeader_1x03_P2.54mm_Vertical | SW4 |
| 1 | A3 | PinHeader_1x03_P2.54mm_Vertical | SW5 |
| 3 | LED | LED_D3.0mm | D1, D2, D3 |
| 24 | 0.1u | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +16 |
| 2 | 10u | CP_Radial_D5.0mm_P2.50mm | C10, C11 |
| 5 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R8 |
| 2 | 4700 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R11 |
| 2 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R7 |
| 1 | 2200 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10 |
Z80CTCDART2 design files
The KiCad project lives in the lynchaj/nhyodyne repository on GitHub; these links point at the commit this page was built from.
Z80CTCDART2: common questions
How big is the Z80CTCDART2 PCB?
The Z80CTCDART2 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Z80CTCDART2?
73 components, from 39 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 Z80CTCDART2 design files?
From the lynchaj/nhyodyne repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Z80CTCDART2 design in my own project?
The repository has no license, so all rights stay with lynchaj. Use it as a reference, and ask the author before reusing the design.
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