HardLabs

V4d2 pico

tomcombriat·TES_e-sax·hardware/v4d2_pico/v4d2_pico.kicad_pcb

V4d2 pico PCB layout, top view — open source RP2040/RP2350 board by tomcombriat

About the V4d2 pico PCB

V4d2 pico is an open source RP2040/RP2350 PCB design by tomcombriat, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 54.2 × 94.2 mm, with 99 components from 64 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the 74HC165, FJ08K, 6N138, MCP3002 and CAT24C256. By type, the board carries 34 test points, 33 resistors, 12 connectors, 8 ICs, 8 capacitors and 1 transistor.

It belongs with the audio and sensors designs in this gallery.

From the project

This is the program and hardware for the TES e-sax

More infos: https://t-e-s.frama.site/en/tesaxophone

The E-sax is an EWI made out of a real sax. It outputs MIDI signals that can be used to generate sounds using a synthesizer for instance the 10k synth. It is design to provide saxophone players a digital instrument to which they can transition easily. Additionnaly from the "standard" behavior it also have features that are allowed by a digital instrument:

Main components on the V4d2 pico

74HC165PicoFJ08K6N138MCP3002CAT24C256

V4d2 pico bill of materials (BOM)

99 components, 64 distinct parts.

QtyPartRefs
3
74HC165
U1, U2, U3
1
Pico
U4
1
FJ08K
U5
1
6N138
U6
1
MCP3002
U7
1
CAT24C256
U8
1
2N7000
Q1
1
joystick
J1
1
LED strip
J2
1
SSD1306 SPI
J3
1
MIDI OUT Y:M5 - R:M4
J4
1
Batt
J5
1
Neck - O:bk, breath:red, Vcc:white, Bite:yellow
J6
1
Conn_01x04_Female
J7
1
MXP5010
J8
1
Thumb
J9
1
ON/OFF
J10
1
MIDI IN bk: 5 R: 4
J11
1
Rvar
J12
1
20k
RV1
Show 44 more
QtyPartRefs
1
SW_DIP_x01
SW1
1
T2
TP1
1
T6
TP2
1
T10
TP3
1
T14
TP4
1
T18
TP5
1
T22
TP6
1
T4
TP7
1
T8
TP8
1
T12
TP9
1
T16
TP10
1
T20
TP11
1
T24
TP12
1
T5
TP14
1
T3
TP15
1
T7
TP16
1
T9
TP17
1
T13
TP18
1
T17
TP19
1
T21
TP20
1
T11
TP21
1
T15
TP22
1
T19
TP23
1
T23
TP24
1
A_in
TP25
2
3.3
TP27, TP29
1
D3
TP30
1
D2
TP31
4
GND
TP32, TP33, TP34, TP37
1
5V
TP35
1
Octave
TP36
1
1N914
D1
1
1000u Ch
C1
1
100u
C2
1
0.1 ceram
C3
1
10n
C4
1
1u
C5
1
470p
C6
2
100n
C7, C8
27
10k
R1, R2, R3, R4, R5, R6, R7, R8 +19
3
220
R25, R32, R33
1
10
R26
1
33
R27
1
10k
R31

V4d2 pico design files

The KiCad project lives in the tomcombriat/TES_e-sax repository on GitHub; these links point at the commit this page was built from.

V4d2 pico: common questions

What microcontroller does the V4d2 pico use?

The V4d2 pico is built around the Pico, from the RP2040/RP2350 family.

How big is the V4d2 pico PCB?

The V4d2 pico measures 54.2 × 94.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the V4d2 pico?

99 components, from 64 distinct parts. The full bill of materials is listed on this page.

Where can I download the V4d2 pico design files?

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

Can I use the V4d2 pico design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which tomcombriat chose for the repository.

Can I test firmware for the V4d2 pico 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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