2 layers40.6 × 108 mm
Useq
Emute-Lab-Instruments/uSEQ
Hardware & firmware of the uSEQ Live Coding CV & Gate Sequencer
60 parts44
2 layers40.6 × 108 mm
Hardware & firmware of the uSEQ Live Coding CV & Gate Sequencer
- Size
- 40.6 × 108 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 172
- Nets
- 128
- Pads
- 510
- Tracks, vias
- 1,479, 208
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 31 Mar 2023
- Updated
- 15 Oct 2026
Overview
Useq1 is an open-source printed circuit board by Emute-Lab-Instruments, from the Emute-Lab-Instruments/uSEQ repository on GitHub. It is a 2-layer board of 40.6 × 108 mm with 172 parts on 128 nets, routed with 1,479 tracks and 208 vias.
It is built around the RP2040, TL072 and W25Q128JVSIQ, with the TLV76733DRVR, 1N4148W and B3U-1000P among its other parts. Its parts include 68 resistors, 42 capacitors, 15 diodes, 14 connectors and 12 ICs. It belongs with the RP2040 boards of this library.
Main components
7
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
TLV76733DRVR
WSON-6(2x2)-40℃~+125℃@(Tj) 1 1.4V@(1A) 16V 1A 3.3V 46dB@(1MHz) 50uA 60uVrms Fixed Over Current Protection、Over Temperature Protection、Soft Start Positive WSON-6(2x2) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
B3U-1000P
SMD,3x2.5mm-25℃~+70℃ 1.53N 1.6mm 12V 2.5mm 3mm 50mA Round Button SMD(SMT) Tab SPST Surface Mount,Vertical SMD,3x2.5mm Tactile Switches ROHSOmronTactile Switches
MMBT3904-TP
SOT-23-55℃~+150℃ 1 NPN 100 200mA 300MHz 300mV 350mW 40V 50nA 6V NPN SOT-23 Bipolar (BJT) ROHSMicro Commercial ComponentsBipolar (BJT)
README
README.mduSEQ
uSEQ is a livecodeable eurorack module.
There's a paper on it here:
Kyriakoudis, Dimitris, & Kiefer, Chris. (2023, April 19). uSEQ: A LISPy Modular Sequencer for Eurorack with a Livecodable Microcontroller. 7th International Conference on Live Coding (ICLC2023), Utrecht, The Netherlands. https://doi.org/10.5281/zenodo.7843874
uSEQ modules, two panel designs (PCB, Aluminium)
uSEQ modules set up within eurorack performance systems
Features:
- Open source hardware and software
- Low-cost DIY project
- Live code using a simple LISP language library, from a laptop or mobile device, using serial-over-USB
- Stream waveforms back over USB serial to a computer, and route it to MIDI or OSC, linking the modular with software and external hardware
- Livecoding engine with flexible timing and varied options for creating gate and CV patterns (from basic waveforms to euclidean sequencing) and structuring arrangements
More info from https://www.emutelabinstruments.co.uk/useq/
Canonical Specs
The firmware/language specs live in docs/specs/MAIN.md. Protocol details live in docs/specs/wire-protocol.md.
Building the Firmware
The firmware is in the uSEQ folder.
Build the firmware in Arduino IDE, using the Earle Philhower Pico core.
| Setting | Value |
|---|---|
| Board | Generic RP2040 |
| Boot Stage 2 | W25Q080 QSPI /2 |
| Flash Size | 8MB (Sketch 1MB, FS: 7MB) |
| CPU Speed | 250MHz (Overclock) |
| Optimize | Optimize Even More (-O3) |
Overclock the Pico at 250Mhz and set the optimisation level to -O3.
We welcome pull requests.
Parts
172| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 100n | Capacitor_SMD:C_0603_1608Metric | C19, C22, C23, C25, C26, C29, C30, C31, C32, C39, C40, C41, C42 |
| 11 | 100n | Capacitor_SMD:C_0402_1005Metric | C10, C11, C14, C16, C17, C18, C20, C21, C24, C33, C37 |
| 10 | 100k | Resistor_SMD:R_0402_1005Metric | R1, R2, R4, R5, R7, R8, R9, R10, R11, R12 |
| 7 | 1k | Resistor_SMD:R_0402_1005Metric | R29, R59, R60, R61, R62, R63, R64 |
| 6 | 47k | Resistor_SMD:R_0603_1608Metric | R50, R51, R52, R53, R54, R55 |
| 6 | 5.1k 1% | Resistor_SMD:R_0402_1005Metric | R16, R17, R19, R20, R67, R68 |
| 5 | 18k | Resistor_SMD:R_0603_1608Metric | R23, R24, R33, R34, R35 |
| 5 | 9.1k | Resistor_SMD:R_0603_1608Metric | R25, R26, R27, R28, R32 |
| 4 | TL072 | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U2, U8, U9, U10 |
| 3 | 1.5k | Resistor_SMD:R_0603_1608Metric | R31, R37, R65 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R41, R42, R43 |
| 3 | 10n | Capacitor_SMD:C_0402_1005Metric | C34, C35, C36 |
| 3 | 10u | Capacitor_SMD:C_0603_1608Metric | C9, C13, C38 |
| 3 | 12k | Resistor_SMD:R_0603_1608Metric | R38, R39, R40 |
| 3 | 27k | Resistor_SMD:R_0603_1608Metric | R56, R57, R58 |
| 3 | 33k | Resistor_SMD:R_0603_1608Metric | R44, R45, R46 |
| 3 | 51k | Resistor_SMD:R_0603_1608Metric | R47, R48, R49 |
| 3 | CJ431 SOT-23 | Package_TO_SOT_SMD:SOT-23 | U5, U6, U12 |
| 2 | 1.8, >24mW | Resistor_SMD:R_0603_1608Metric | R15, R66 |
| 2 | 100k | Eurocad:Alpha9mmPot | RV1, RV2 |
| 2 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2 |
| 2 | 1N5819 | Diode_SMD:D_SOD-323 | D3, D4 |
| 2 | 1nF | Capacitor_SMD:C_0402_1005Metric | C6, C7 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C12, C15 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C5 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 22u 0805 | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C8 |
| 2 | 27 | Capacitor_SMD:C_0402_1005Metric | R21, R22 |
| 2 | 30p | Capacitor_SMD:C_0402_1005Metric | C27, C28 |
| 2 | 33k | Resistor_SMD:R_0402_1005Metric | R13, R14 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R3, R6 |
| 2 | 5V reference | TestPoint:TestPoint_Pad_1.5x1.5mm | TP3, TP9 |
| 2 | B3U-1000P | digikey-footprints:Switch_Tactile_SMD_B3U-1000P | S1, S2 |
| 2 | Conn_02x01 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J7, J8 |
| 2 | FerriteBead GZ2012D101TF | Resistor_SMD:R_0805_2012Metric | FB1, FB2 |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | TLV76733DRVR | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm_ThermalVias | U1, U4 |
| 1 | -5V Ref | TestPoint:TestPoint_Pad_1.5x1.5mm | TP4 |
| 1 | 1V1 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP8 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R36 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R18 |
| 1 | Analog Power | TestPoint:TestPoint_Pad_1.5x1.5mm | TP2 |
| 1 | CV In 1 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | CV In 2 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | CV Out | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | CVIn | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | DNF | Capacitor_SMD:C_0805_2012Metric | R30 |
| 1 | Digital Out | TestPoint:TestPoint_Pad_1.5x1.5mm | TP7 |
| 1 | Gate In 1 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
| 1 | Gate In 2 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | Hanbo_USB_C_Receptacle_USB2.0_MC-110LD-L137 | emutelab:USB-C-TH_MC-110LD-L137-A | J1 |
| 1 | LED A1 | LED_THT:LED_D3.0mm_FlatTop | D7 |
| 1 | LED A2 | LED_THT:LED_D3.0mm_FlatTop | D8 |
| 1 | LED A3 | LED_THT:LED_D3.0mm_FlatTop | D11 |
| 1 | LED CV In 1 | LED_THT:LED_D3.0mm_FlatTop | D9 |
| 1 | LED CV In 2 | LED_THT:LED_D3.0mm_FlatTop | D10 |
| 1 | LED D1 | LED_THT:LED_D3.0mm_FlatTop | D12 |
| 1 | LED D2 | LED_THT:LED_D3.0mm_FlatTop | D13 |
| 1 | LED D3 | LED_THT:LED_D3.0mm_FlatTop | D14 |
| 1 | LED Gate In 1 | LED_THT:LED_D3.0mm_FlatTop | D5 |
| 1 | LED Gate In 2 | LED_THT:LED_D3.0mm_FlatTop | D6 |
| 1 | LED Test | LED_SMD:LED_0603_1608Metric | D15 |
| 1 | MCP6002-xMS | Package_SO:MSOP-8_3x3mm_P0.65mm | U3 |
| 1 | Out A1 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J9 |
| 1 | Out A2 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J10 |
| 1 | Out A3 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J11 |
| 1 | Out D1 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J12 |
| 1 | Out D2 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J13 |
| 1 | Out D3 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J14 |
| 1 | PIN_HEADER_2x5 POWER | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical_SMD | H1 |
| 1 | RP2040 | emutelab:RP2040-QFN-56 | U7 |
| 1 | RP2040 Power | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J15 |
| 1 | SW_Push | mouser:GPBS850N | SW1 |
| 1 | SW_SPDT | emutelab:Thonk DWB2 | SW3 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U11 |
| 1 | YXC X322512MSB4SI | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
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Questions
How big is the Useq1 PCB?
It measures 40.6 × 108 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Useq1 use?
172 parts, built around the RP2040, TL072, W25Q128JVSIQ and TLV76733DRVR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Useq1 KiCad files?
From the Emute-Lab-Instruments/uSEQ repository on GitHub, at the commit this page was made from: the board is hardware/version1.0/useq1/useq1.kicad_pcb and its schematic hardware/uSeqIns1.0/uSeqIns1.0.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Useq1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Emute-Lab-Instruments before reusing the design.