HardLabs

Button midi thing

brunostjohn·button-midi-thing

Button midi thing PCB layout, top view — open source RP2040/RP2350 board by brunostjohn

About the Button midi thing PCB

Button midi thing is an open source RP2040/RP2350 PCB design by brunostjohn, published on GitHub. It is a 2-layer board measuring 248.1 × 248.1 mm, with 289 components from 17 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q16JVZPIQ, USBLC6-2SC6 and XC6206PXXXMR. By type, the board carries 199 diodes, 64 switches, 11 capacitors, 8 resistors, 4 ICs and 1 crystal.

It belongs with the audio designs in this gallery.

Main components on the Button midi thing

RP2040W25Q16JVZPIQUSBLC6-2SC6XC6206PXXXMR

Button midi thing bill of materials (BOM)

289 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
U1
1
W25Q16JVZPIQ
U2
1
USBLC6-2SC6
U3
1
XC6206PXXXMR
XC6206PxxxMR
U4
1
X322512MSB4SI
Y1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J2
1
500MA
500mA
F1
64
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +56
71
C2099
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +63
128
WS2812B-2020
D65, D66, D67, D68, D69, D70, D71, D72 +120
2
22 pF
C1, C2
2
1UF
1uF
C4, C6
7
100NF
100nF
C7, C8, C9, C10, C11, C12, C13
3
1k
R1, R2, R5
2
27R
R3, R4
2
5K1
5k1
R6, R7
1
500R
R8

Button midi thing design files

The KiCad project lives in the brunostjohn/button-midi-thing repository on GitHub; these links point at the commit this page was built from.

Button midi thing: common questions

What microcontroller does the Button midi thing use?

The Button midi thing is built around the RP2040, from the RP2040/RP2350 family.

How big is the Button midi thing PCB?

The Button midi thing measures 248.1 × 248.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Button midi thing?

289 components, from 17 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 Button midi thing design files?

From the brunostjohn/button-midi-thing 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 Button midi thing design in my own project?

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

Can I test firmware for the Button midi thing 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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