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Midi grid

zukaitis·midi-grid·Hardware/midi_grid.kicad_pcb

Midi grid PCB layout, top view — open source STM32 board by zukaitis
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About the Midi grid PCB

Midi grid is an open source STM32 PCB design by zukaitis, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 275 × 200 mm, with 319 components from 33 distinct parts.

Its main chip is the STM32F411RCT6, from the STM32 family. Other key parts include the SN74HC138PW, USBUF02W6, VO617A, LD1117STR and Nokia 5110 LCD. By type, the board carries 158 diodes, 65 resistors, 34 transistors, 26 switches, 21 capacitors and 7 ICs.

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

From the project

DIY midi controller project

Main components on the Midi grid

STM32F411RCT6SN74HC138PWUSBUF02W6VO617ALD1117STRNokia 5110 LCD

Midi grid bill of materials (BOM)

319 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F411RCT6
U1
3
SN74HC138PW
74HC138
U2, U3, U4
1
USBUF02W6
U5
1
VO617A
U6
1
LD1117STR
U7
1
Nokia 5110 LCD
A1
20
BSH205G2
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +12
14
NX7002AK
Q21, Q22, Q23, Q24, Q25, Q26, Q27, Q28 +6
1
ABM3B-8.000MHZ-B2-T
8MHz
Y1
1
105017-0001
USB_OTG
J1
2
FC68133
3.5mm jack
J2, J3
1
22-27-2041
Conn_01x04_Male
J4
1
1206L050YR
Polyfuse
F1
1
QR
GR2
4
Button_matrix_4x4
SW1, SW2, SW3, SW4
14
SW_Push
SW5, SW7, SW10, SW12, SW13, SW14, SW15, SW16 +6
4
SW_Push
SW6, SW8, SW9, SW11
2
SW_Push
SW21, SW22
2
EC12E24204A9
SW25, SW26
64
LED_RAGB
D1, D3, D5, D7, D9, D11, D13, D15 +56
Show 13 more
QtyPartRefs
81
LL4148-GS08
LL4148
D2, D4, D6, D8, D10, D12, D14, D16 +73
13
LED_RAGB
D129, D132, D134, D136, D140, D142, D144, D146 +5
10
100nF
C1, C2, C3, C6, C7, C8, C9, C11 +2
4
2.2uF
C4, C5, C10, C12
2
27pF
C14, C15
5
10uF
C16, C18, C19, C20, C21
42
10K
R1, R2, R3, R4, R5, R6, R7, R8 +34
5
1K
R21, R22, R23, R24, R64
4
249R
R25, R26, R27, R28
4
294R
R33, R34, R35, R36
4
51R
R41, R42, R43, R44
5
220R
R57, R58, R60, R61, R62
1
1.6K
R65

Midi grid design files

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

Midi grid: common questions

What microcontroller does the Midi grid use?

The Midi grid is built around the STM32F411RCT6, from the STM32 family.

How big is the Midi grid PCB?

The Midi grid measures 275 × 200 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Midi grid?

319 components, from 33 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 Midi grid design files?

From the zukaitis/midi-grid repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Midi grid design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which zukaitis chose for the repository.

Can I test firmware for the Midi grid without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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