HardLabs

4HPico

rheslip·2HPico-Eurorack-Module-Hardware·4HPico KiCad design files/4HPico.kicad_pcb

4HPico PCB layout, top view — open source RP2040/RP2350 board by rheslip
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About the 4HPico PCB

4HPico is an open source RP2040/RP2350 PCB design by rheslip, published on GitHub. It is a 2-layer board measuring 20.3 × 110 mm, with 71 components from 38 distinct parts.

Its main chip is the RP2350-WAVESHARE, from the RP2040/RP2350 family. Other key parts include the 74LVC1G3157, AMS1117-5.0, LM4040DBZ-10, TL072 and PCM5102A. By type, the board carries 31 resistors, 17 capacitors, 8 ICs, 8 connectors, 2 diodes and 1 switch.

It belongs with the audio and displays & leds designs in this gallery.

From the project

2HP Eurorack module based on Raspberry Pi Pico 2

Another 4HP Eurorack module based on Raspberry Pi RP2350 Pico 2

4HPico is the 2HPico expanded with 2 dedicated CVin, 2 dedicated CV out and two jumperable CV in/outs. Encoder with a 64x32 OLED display instead of pots for setting parameters. This is a single PCB design which requires a 3D printed panel or PCB panel.

Panel .stl file for 3D printing in /Panel. No plans to do a panel PCB at this point.

Main components on the 4HPico

74LVC1G3157AMS1117-5.0LM4040DBZ-10TL072PCM5102AMCP6002MCP6022

4HPico bill of materials (BOM)

71 components, 38 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74LVC1G3157
~
U1, U2
1
AMS1117-5.0
U3
1
LM4040DBZ-10
U4
1
TL072
U5
1
PCM5102A
TL072
U6
1
MCP6002
MCP6022
U7
1
MCP6022
U9
3
CONN_01X04_PIN
PJ3001F
J1, J2, J3
3
PJ3001F
J4, J5, J6
1
Conn_02x05_Odd_Even
J7
1
Conn_01x04_Pin
J8
2
5K Zero Trim
RV1, RV2
1
RP2350-WAVESHARE
RP2350-WaveShare
RZ1
1
RotaryEncoder_Switch
SW1
2
1N5819WS
D1, D2
1
33UH
33uH
L2
3
10u
C1, C2, C8
1
22u
C3
9
.1u
C4, C9, C10, C12, C13, C14, C15, C16 +1
2
18P
220p
C5, C17
Show 18 more
QtyPartRefs
2
220p
C6, C18
1
47R
100R
R1
1
2.2K
2.2k
R2
1
20K
47k
R4
1
47K
47k
R5
2
100K
100k
R6, R8
1
120K
180k
R7
1
180K
180k
R9
2
10K
3.3k
R10, R17
2
39K
24k
R11, R15
4
1k
R12, R19, R31, R32
2
47k
R13, R14
2
100k
R16, R21
2
180k
R18, R20
1
100R
R22
4
10k
R23, R24, R26, R28
2
3.3k
R25, R27
2
24k
R29, R30

4HPico design files

The KiCad project lives in the rheslip/2HPico-Eurorack-Module-Hardware repository on GitHub; these links point at the commit this page was built from.

4HPico: common questions

What microcontroller does the 4HPico use?

The 4HPico is built around the RP2350-WAVESHARE, from the RP2040/RP2350 family.

How big is the 4HPico PCB?

The 4HPico measures 20.3 × 110 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 4HPico?

71 components, from 38 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 4HPico design files?

From the rheslip/2HPico-Eurorack-Module-Hardware 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 4HPico design in my own project?

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

Can I test firmware for the 4HPico 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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