HardLabs

Commodore Plus 4

baldengineer·bit-preserve·Commodore/Plus4/Commodore Plus 4.kicad_pcb

Commodore Plus 4 PCB layout, top view — open source board by baldengineer

About the Commodore Plus 4 PCB

Commodore Plus 4 is an open source PCB design by baldengineer, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 284.7 × 158.9 mm, with 212 components from 70 distinct parts.

Other key parts include the 8360, 8501, 6551, 74LS08 and 6529. By type, the board carries 66 inductors, 52 capacitors, 27 ICs, 27 resistors, 14 connectors and 4 transistors.

It belongs with the retro computing designs in this gallery.

From the project

Project for capturing vintage, classic, aka old computer schematics in KiCad.

The schematic for the Commodore Plus4 (314001-04) was taken from the schematics on zimmers.net and converted into KiCad (Version 5.12)

Main schematic RF Modulator (rfmodulator.sch)

The PCB (Rev 310162 Rev D) layout (components only) has also been completed and 3D parts populated. The 3D parts are not 100% accurate and should only be used as eye candy.Work still needs to be completed on the track layout but this will take a lot of time to get it to match the original PCB

Commodore Plus 4, from the project README
From the project README

Main components on the Commodore Plus 4

83608501655174LS08652974LS0474LS06NLM55574LS257416425164174LS13974LS17574LS2723128

Commodore Plus 4 bill of materials (BOM)

212 components, 70 distinct parts.

QtyPartRefs
1
8360
U1
1
8501
U2
1
6551
U3
1
74LS08
U4
2
6529
U5, U27
1
74LS04
U6
1
74LS06N
U7
1
LM555
U8
2
74LS257
U9, U10
8
4164
U11, U12, U13, U14, U15, U16, U17, U18
1
251641
U19
1
74LS139
U20
1
74LS175
U21
1
74LS27
U22
4
23128
U23, U24, U25, U26
1
RFMODULATOR
M1
3
2SC1815
Q1, Q2, Q3
1
2SD880
Q4
1
17.73447
Y1
1
1.8432M
Y2
Show 50 more
QtyPartRefs
1
Conn_01x04
CN1
1
Conn_01x07
CN2
1
Conn_01x07
CN3
1
50PinEdge
CN4
2
Conn_01x08
CN5, CN6
1
Conn_01x08
CN7
1
Keyboard-Matrix
CN8
6
Jumper_NC_Dual
J1, J2, J3, J4, J5, J6
1
D_Bridge_+-AA
CR1
1
6.8V
CR2
10
1N914
CR11, CR12, CR13, CR14, CR15, CR16, CR17, CR18 +2
1
1.5A
F1
2
3k3
RP1, RP2
2
Resistor-Network
RP3, RP4
1
SW_DPST
SW1
1
SW_Push
SW2
34
Ferrite_Bead_Small
FB2, FB3, FB4, FB5, FB6, FB7, FB8, FB9 +26
28
Ferrite_Bead_Small
FB15, FB16, FB17, FB18, FB19, FB20, FB21, FB41 +20
1
EMI_Filter
L1
1
EMI_Filter_CommonMode
L2
2
1.2u
L3, L4
1
100u
C1
30
100n
C2, C9, C15, C16, C21, C24, C25, C26 +22
1
220n
C3
1
220n
C4
2
220n
C5, C6
1
2200u
C7
3
10u
C8, C20, C27
1
4-20p
C10
1
33p
C11
1
220p
C12
1
150p
C13
1
10n
C14
4
10u
C17, C18, C22, C30
1
2700p
C19
1
1u
C23
1
100n
C40
1
100n
C100
1
4k7
R1
3
10k
R2, R26, R27
2
470
R3, R7
1
220
R4
1
18k
R5
2
1k5
R6, R17
3
100k
R8, R16, R19
9
1k
R9, R10, R12, R13, R21, R22, R23, R24 +1
1
12k
R11
2
240
R14, R15
1
47k
R18
1
3k
R20

Commodore Plus 4 design files

The KiCad project lives in the baldengineer/bit-preserve repository on GitHub; these links point at the commit this page was built from.

Commodore Plus 4: common questions

How big is the Commodore Plus 4 PCB?

The Commodore Plus 4 measures 284.7 × 158.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Commodore Plus 4?

212 components, from 70 distinct parts. The full bill of materials is listed on this page.

Where can I download the Commodore Plus 4 design files?

From the baldengineer/bit-preserve repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Commodore Plus 4 design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which baldengineer chose for the repository.

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