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Z80SERIAL3

lynchaj·nhyodyne·Z80SERIAL3/Z80SERIAL3.kicad_pcb

Z80SERIAL3 PCB layout, top view — open source board by lynchaj
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About the Z80SERIAL3 PCB

Z80SERIAL3 is an open source PCB design by lynchaj, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 61 components from 35 distinct parts.

Other key parts include the 74LS244, 74LS245, 74LS02, 74LS32 and 74LS688. By type, the board carries 17 capacitors, 12 connectors, 10 ICs, 10 resistors, 8 diodes and 2 switches.

It belongs with the retro computing designs in this gallery.

From the project

Modular Backplane Computer

Uses Intel 8250 Asynchronous Communication Adapter (ACE) derivative Universal Asynchronous Receiver Transmitter (UART)

TTL level serial port for USB adapters with optional power supply

External experimental connector with spare GPIO pins

J1 Interrupt Select, connect 1-2 for INT# default, connect 2-3 for NMI#, none for no interrupt Note: can connect J1 pin 2 via flying lead to Z80 processor IM2 connector

Main components on the Z80SERIAL3

74LS24474LS24574LS0274LS3274LS68874LS06TL16C550CFNMAX232UART CLK

Z80SERIAL3 bill of materials (BOM)

61 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74LS244
U1, U3
1
74LS245
U2
1
74LS02
U4
1
74LS32
U5
1
74LS688
U6
1
74LS06
U7
1
TL16C550CFN
U8
1
MAX232
U9
1
UART CLK
U10
1
INT# OR NMI#
J1
1
VCC OR RI#
J2
1
GND OR DCD#
J3
1
TTL SERIAL
J4
1
EXT DMA
J5
1
TTL SER PWR
J7
1
CTS/DSR
J8
1
EXPERIMENT
J9
1
SPARES
P1
1
Z80 BUS BACKPLANE
P2
1
DAISY CHAIN
P3
Show 15 more
QtyPartRefs
1
RS-232
P5
1
EXT RECOVERY
JP1
1
10K
RR1
1
IO PORT ADDR
SW1
1
RECOVERY
SW2
5
LED
D1, D2, D3, D4, D5
1
1N4148
D6
2
1N5817
D7, D8
9
0.1u
C1, C2, C3, C4, C5, C6, C7, C8 +1
4
10u
C10, C11, C16, C17
4
1u
C12, C13, C14, C15
6
470
R1, R2, R4, R5, R6, R7
2
4700
R3, R11
1
10K
R8
1
10
R9

Z80SERIAL3 design files

The KiCad project lives in the lynchaj/nhyodyne repository on GitHub; these links point at the commit this page was built from.

Z80SERIAL3: common questions

How big is the Z80SERIAL3 PCB?

The Z80SERIAL3 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Z80SERIAL3?

61 components, from 35 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 Z80SERIAL3 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 Z80SERIAL3 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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