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RetroZ-disk

formix·RetroZ·Projects/RetroZ-disk/RetroZ-disk.kicad_pcb

RetroZ-disk PCB layout, top view — open source AVR/Arduino board by formix
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About the RetroZ-disk PCB

RetroZ-disk is an open source AVR/Arduino PCB design by formix, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 76.2 × 73.7 mm, with 22 components from 17 distinct parts.

Its main chip is the ATMEGA328P-PU, from the AVR/Arduino family. Other key parts include the UA78M33CDCYR, 74LS138, TXB0104DW and SN74LS32N. By type, the board carries 9 capacitors, 5 ICs, 2 connectors, 2 resistors, 1 transistor and 1 crystal.

It belongs with the retro computing designs in this gallery.

From the project

An S80 Single Board Retro Computer

This board is developped using the S80 physical specifications. The specifications are not currently available online but I plan to fix that in a future revision.

You can find the board schematic as a PDF here.

You can download the BOM here. It is an Open Document Worksheet file and you should be able to open it with Open/Libre Office or MS Excel. If you have issue, contact me.

RetroZ-disk, from the project README
From the project README

Main components on the RetroZ-disk

UA78M33CDCYR74LS138TXB0104DWATMEGA328P-PUSN74LS32N

RetroZ-disk bill of materials (BOM)

22 components, 17 distinct parts.

QtyPartRefs
1
UA78M33CDCYR
U1
1
74LS138
U2
1
TXB0104DW
U3
1
ATMEGA328P-PU
U4
1
SN74LS32N
U5
1
2SA933
Q1
1
20Mhz
Y1
1
Micro_SD_Card
J1
1
IO SELECTOR
J2
1
S80 Interface
I1
1
DISK IO
D1
1
0.33uF
C1
1
0.1uF
C2
2
20pf
C3, C4
5
1uF
C5, C6, C7, C8, C9
1
10k
R1
1
220
R2

RetroZ-disk design files

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

RetroZ-disk: common questions

What microcontroller does the RetroZ-disk use?

The RetroZ-disk is built around the ATMEGA328P-PU, from the AVR/Arduino family.

How big is the RetroZ-disk PCB?

The RetroZ-disk measures 76.2 × 73.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RetroZ-disk?

22 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the RetroZ-disk design files?

From the formix/RetroZ repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the RetroZ-disk design in my own project?

Yes, under the terms of its Apache-2.0 license, which formix chose for the repository.

Can I test firmware for the RetroZ-disk without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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