HardLabs

Pocketsequencer

northernpaws·pocketsequencer·hardware/boards/v0.2/pocket_synth_v0.2/pocket_synth_v0.2.kicad_pcb

Pocketsequencer PCB layout, top view — open source STM32 board by northernpaws

About the Pocketsequencer PCB

Pocketsequencer is an open source STM32 PCB design by northernpaws, published on GitHub under the Custom license license. It is a 6-layer board measuring 77 × 98 mm, with 62 components from 27 distinct parts.

Its main chip is the STM32H743XIHx, from the STM32 family. Other key parts include the NORA-W40, SDRAM, STM32H753VIHx, W25Q128JVS and Microchip_BM83. By type, the board carries 29 capacitors, 13 connectors, 7 ICs, 5 resistors, 4 switches and 2 crystals.

It belongs with the audio and iot & wireless designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

STM32H743ZI-based pocket-sized sequencer with synth engines and sampler, velocity pads, MPE aftertouch, BLE MIDI, Bluetooth audio, and more.

480 MHz Arm® Cortex®-M7 32-bit Processor (STM32H743ZIT6) Floating-point unit DSP instructions High-speed memory controller Quad SPI interface for flash High-speed USB host and device mode Several SAI audio blocks 24 bit Audio Codec (NAU88C22YG) DAC: 94dB SNR and -84dB THD (“A” weighted) ADC: 90dB SNR and -80dB THD (“A” weighted) Integrated BTL speaker driver: 1W into 8Ω Integrated head-phone driver: 40mW into 16Ω Optional Bluetooth Audio & MIDI (nRF5340) Wirelessly connect Bluethooth headphones and speakers Connect devices for BLE MIDI inputs and outputs uFL connector for case-mounted antenna…

Main components on the Pocketsequencer

STM32H743XIHxNORA-W40SDRAMSTM32H753VIHxW25Q128JVSMicrochip_BM83NINA-W13

Pocketsequencer bill of materials (BOM)

62 components, 27 distinct parts.

QtyPartRefs
1
STM32H743XIHx
U1
1
NORA-W40
U2
1
SDRAM
U3
1
STM32H753VIHx
U4
1
W25Q128JVS
U5
1
Microchip_BM83
U6
1
NINA-W13
U7
1
32.768kHz
Y1
1
HSE
Y2
1
Conn_ARM_JTAG_SWD_10
J1
1
USB
J2
4
AudioJack3
J3, J4, J5, J6
1
DISPLAY
J7
1
SDCARD
J8
1
Conn_01x05_Pin
J10
1
Conn_01x02_Pin
J11
1
Conn_01x03_Pin
J12
1
INPUT
J13
1
UART4
J14
1
Battery
BT1
Show 7 more
QtyPartRefs
1
IM73A135V01
MK2
4
SW_Push
SW1, SW2, SW3, SW4
24
100nf
C1, C2, C3, C6, C8, C9, C10, C11 +16
1
4.7uF
C4
4
C
C5, C7, C21, C22
2
10k
R1, R2
3
R
R3, R4, R5

Pocketsequencer design files

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

Pocketsequencer: common questions

What microcontroller does the Pocketsequencer use?

The Pocketsequencer is built around the STM32H743XIHx, from the STM32 family.

How big is the Pocketsequencer PCB?

The Pocketsequencer measures 77 × 98 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the Pocketsequencer?

62 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pocketsequencer design files?

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

Can I use the Pocketsequencer design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Pocketsequencer 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.

Earlier revisions in the repo: pocket_synth

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