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Backplane

Bread80·CPCModular·Backplane/Backplane.kicad_pcb

Backplane PCB layout, top view — open source board by Bread80

About the Backplane PCB

Backplane is an open source PCB design by Bread80, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 246.4 × 120.7 mm, with 82 components from 25 distinct parts.

Other key parts include the RS6-0505S, ADM708 or MAX708 and TMU 3-0512. By type, the board carries 52 diodes, 18 connectors, 4 capacitors, 3 ICs, 2 switches and 1 fuse.

It belongs with the retro computing designs in this gallery.

From the project

Modular Amstrad CPC Compatible Computer (WiP)

***This project is an unfinished work in progress. It currently has bugs and not all the features have been tested!

The current modules are designed to fit a slightly modified RC2014 Pro backplane. In the text below I shall explain the current status of the project, workarounds needed to get it running and basic build details. Due to the work in progress status of the project this document will be intentionaly terse.

Backplane, from the project README
From the project README

Main components on the Backplane

RS6-0505SADM708 or MAX708TMU 3-0512

Backplane bill of materials (BOM)

82 components, 25 distinct parts.

QtyPartRefs
1
RS6-0505S
U1
1
ADM708 or MAX708
U2
1
TMU 3-0512
U3
4
Conn_02x25_Odd_Even
J1, J2, J3, J4
4
Conn_02x36_Top_Bottom
J5, J6, J7, J8
3
Conn_02x25_Top_Bottom
J9, J10, J11
1
Expansion Top (Edge connector)
J12
1
Expansion Bottom (Edge connector)
J13
1
USB_B
J14
1
TE 171826-4 ('Berg')
J15
1
Barrel_Jack_MountingPin
J16
1
SCART POWER
J17
1
TE 770997-1 ('Molex')
J18
1
MF-R600-2
F1
1
SSP1S1M6xEA
SW1
1
PTS645VH58-2 LFS
SW2
1
B57238S0709M000
TH1
2
SA5.0CA-E3/54
D1, D2
1
POWER
D3
48
PESD5V0V1BA
D4, D5, D6, D7, D8, D9, D10, D11 +40
Show 5 more
QtyPartRefs
1
SA12CA
D53
2
220uF 100V
C1, C3
1
470uF 6.3V
C2
1
0.1uF
C4
1
470
R1

Backplane design files

The KiCad project lives in the Bread80/CPCModular repository on GitHub; these links point at the commit this page was built from.

Backplane: common questions

How big is the Backplane PCB?

The Backplane measures 246.4 × 120.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Backplane?

82 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the Backplane design files?

From the Bread80/CPCModular repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Backplane design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which Bread80 chose for the repository.

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