HardLabs

Pq-4

mar0x·pq-4·pq-4/pq-4.kicad_pcb

Pq-4 PCB layout, top view — open source board by mar0x

About the Pq-4 PCB

Pq-4 is an open source PCB design by mar0x, published on GitHub. It is a 2-layer board measuring 71.1 × 108.6 mm, with 110 components from 39 distinct parts.

Other key parts include the M5218. By type, the board carries 56 resistors, 33 capacitors, 9 transistors, 5 ICs, 4 diodes and 2 connectors.

From the project

BOSS PQ-4 Parametric Equalizer replica

Main components on the Pq-4

M5218

Pq-4 bill of materials (BOM)

110 components, 39 distinct parts.

QtyPartRefs
5
M5218
IC1, IC2, IC3, IC4, IC5
1
2SK184-GR
Q1
4
2SC3378-GR
Q2, Q5, Q6, Q9
2
C2458-GR
Q3, Q4
2
2SK118-Y
Q7, Q8
1
Conn_01x07_Male
J1
1
Conn_01x10_Male
J2
1
Barrel_Jack_Switch
DC_IN1
1
D_Zener_Small
D1
2
D
D2, D3
1
D
D4
3
47nF
C1, C3, C28
5
10µF
C2, C6, C18, C30, C33
7
1µF
C4, C5, C22, C23, C24, C27, C29
2
1.2nF
C7, C26
2
6.8nF
C8, C10
2
470pF
C9, C11
2
220pF
C12, C13
1
10nF
C14
2
47µF
C15, C32
Show 19 more
QtyPartRefs
2
33nF
C16, C17
1
0.1µF
C19
1
2.2nF
C20
2
47pF
C21, C25
1
100µF
C31
1
?
R1
11
10k
R2, R4, R7, R10, R11, R13, R29, R39 +3
8
1M
R3, R5, R6, R8, R27, R49, R50, R51
2
6.8k
R9, R48
6
47k
R12, R35, R36, R41, R43, R46
8
22k
R14, R15, R16, R17, R28, R30, R31, R33
4
2.7k
R18, R19, R32, R34
4
100k
R20, R22, R52, R54
4
56k
R21, R23, R24, R25
1
100
R26
4
4.7k
R37, R40, R44, R45
1
18k
R38
1
1k
R53
1
1.5k
R56

Pq-4 design files

The KiCad project lives in the mar0x/pq-4 repository on GitHub; these links point at the commit this page was built from.

Pq-4: common questions

How big is the Pq-4 PCB?

The Pq-4 measures 71.1 × 108.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pq-4?

110 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pq-4 design files?

From the mar0x/pq-4 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Pq-4 design in my own project?

The repository has no license, so all rights stay with mar0x. Use it as a reference, and ask the author before reusing the design.

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