HardLabs

Quadulator

GlobalSequence·quadulator·hardware/quadulator.kicad_pcb

Quadulator PCB layout, top view — open source RP2040/RP2350 board by GlobalSequence

About the Quadulator PCB

Quadulator is an open source RP2040/RP2350 PCB design by GlobalSequence, published on GitHub. It is a 2-layer board measuring 144.1 × 181.4 mm, with 121 components from 31 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the L7805, MCP6004, CD4051B, TL074 and 74HC595. By type, the board carries 45 resistors, 21 connectors, 18 diodes, 15 capacitors, 7 ICs and 5 switches.

It belongs with the audio designs in this gallery.

From the project

Quadulator - A quad LFO/ADSR envelope generator for Eurorack synthesizers

Main components on the Quadulator

L7805PicoMCP6004CD4051BTL07474HC595

Quadulator bill of materials (BOM)

121 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
L7805
U1
1
Pico
U2
1
MCP6004
U3
1
CD4051B
U4
2
TL074
U5, U7
1
74HC595
U6
4
2N3904
Q1, Q2, Q3, Q4
1
Eurorack Power
J1
4
CONN_01X08
Conn_01x08
J2, J3, J5, J7
4
CONN_01X10
Conn_01x10
J4, J6, J8, J9
12
3.5mm jack
J10, J11, J12, J13, J14, J15, J16, J17 +4
5
10K
10k
RV1, RV2, RV3, RV4, RV5
5
SW_Push
SW1, SW2, SW3, SW4, SW5
1
VAL**
mouse-bite-2.54mm-slot
5
BAT85
D1, D2, D3, D4, D5
9
LED
D6, D7, D8, D9, D10, D11, D12, D13 +1
4
LED_Dual_Bidirectional
D14, D15, D16, D17
2
10U
10u
C1, C2
8
100N
100n
C3, C9, C10, C11, C12, C13, C14, C15
4
4.7N
4.7n
C5, C6, C7, C8
Show 11 more
QtyPartRefs
1
470N
470n
C16
8
10K
10k
R1, R12, R15, R18, R21, R23, R25, R27
8
100K
100k
R2, R3, R5, R7, R9, R24, R26, R28
4
300K
300k
R4, R6, R8, R10
5
30K
30k
R11, R14, R17, R20, R31
4
1k
R13, R16, R19, R22
1
18K
18k
R29
1
6.8K
6.8k
R30
1
12K
12k
R32
9
470R
R33, R34, R35, R36, R37, R38, R39, R40 +1
4
330R
R41, R42, R43, R44

Quadulator design files

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

Quadulator: common questions

What microcontroller does the Quadulator use?

The Quadulator is built around the Pico, from the RP2040/RP2350 family.

How big is the Quadulator PCB?

The Quadulator measures 144.1 × 181.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Quadulator?

121 components, from 31 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 Quadulator design files?

From the GlobalSequence/quadulator repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Quadulator design in my own project?

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

Can I test firmware for the Quadulator without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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