4 layers56 × 60 mm
PCBA KNOT
intechstudio/knot
Knot is the bridge between old-school MIDI gear like synthesizers, groove boxes, guitar pedals and neat USB MIDI devices.
111 parts58GPL-3.0
4 layers56 × 60 mm
MIDI Host
scorchio/knotCustom firmware for the Intech Studio Knot
- Size
- 56 × 60 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 109
- Nets
- 90
- Pads
- 387
- Tracks, vias
- 793, 139
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 25 Jun 2023
- Updated
- 30 Jun 2023
Overview
MIDI Host is an open-source printed circuit board by scorchio, from the scorchio/knot repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 56 × 60 mm with 109 parts on 90 nets, routed with 793 tracks and 139 vias.
It is built around the ESP32-S3-WROOM-1U-N4, TPS5430DDA and BL1551B, with the SESRV05-4, 74HC165D and 74HC1G14GV among its other parts. Its parts include 26 capacitors, 22 resistors, 17 ICs, 5 diodes and 3 connectors. It belongs with the audio and music boards and the ESP32 boards of this library.
Main components
12
ESP32-S3-WROOM-1U-N4
SMD,19.2x18mm-103.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 UART、SPI、I2C、I2S、USB SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
TPS5430DDA
ESOP-8-40℃~+125℃@(TJ) 1 1.221V~32.04V 3A 4.4mA 5.5V~36V 500kHz Adjustable Buck Buck Built-in No ESOP-8 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BL1551B
SC-70-6-40℃~+125℃ 1 1.8V~5.5V 15.5pF 2.7Ω@5.0V 20ns 2:1 30ns 350MHz SC-70-6 Analog Switches, Multiplexers ROHSBLAnalog Switches, Multiplexers
SESRV05-4
SOT-23-6-55℃~+125℃ 0.4pF、0.8pF 12.5V、17.5V 1uA 5A 5V 6V 80W@8/20us ESD Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSSEMIWAREESD And Surge Protection (TVS/ESD)
74HC165D
SO-16-40℃~+125℃ 1 28ns@6V,50pF 2V~6V 35MHz 500mW 74HC 8 Parallel or Serial to Serial SOIC-16 Shift Registers ROHSNexperiaShift Registers
74HC1G14GV
SOT-23-5-40℃~+85℃ 1 1.9V、4.18V、4.4V、5.68V、5.9V 100mV、100mV、100mV、260mV、330mV 10uA 2.6mA 2.6mA 2V~6V 74HC 9ns@6V,50pF Noise suppression function Schmitt trigger SOT-23-5 Inverters ROHSTECH PUBLICInvertersLN1134A332MR-G
SOT-23-5-40℃~+85℃ 1 180mV@(100mA) 3.3V 300mA 60dB@(1kHz) 70uA 7V Fixed Over Current Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSNATLINEARVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
CS1E470M-CRE54
SMD,D6.3xL5.4mm-40℃~+105℃ 1000hrs@105℃ 25V 47uF 5.4mm 6.3mm ±20% SMD,D6.3xL5.4mm Aluminum Electrolytic Capacitors - SMD ROHSSTMicroelectronicsAluminum Electrolytic Capacitors - SMD
MPZ2012S101AT000
0805-55℃~+125℃ 1 100Ω@100MHz 20mΩ 4A ±25% 0805 Ferrite Beads ROHSTDKFerrite Beads
PJ-320B
SMD-25℃~+75℃ 24V 25mA 3.5mm Headphone Jack Phosphor Bronze SMD Audio Connectors ROHSSOFNGAudio Connectors (Headphones)
CA45-C6R3K337T
CASE-C-6032-25(mm)-55℃~+125℃ 330uF 500mΩ@100kHz 6.3V ±10% CASE-C-6032-25(mm) Tantalum Capacitors ROHSHunan Xiangyee in S&TTantalum Capacitors
DC-C033D-5.5A-2.5
插件-20℃~+70℃ 2.5mm 20V 5.5A 5.8mm DC Power Jack Right Angle 插件 DC Power Connectors ROHSXKB ConnectionDC Power Connectors
README
README.mdKNOT - USB MIDI Host
Knot is the bridge between old-school MIDI gear like synthesizers, groove boxes, guitar pedals and neat USB MIDI devices. Leave out the computer from the equation and control instruments seamlessly with Grid - or any other - USB controller.
You can find more info on the website or in the Knot - Starter's Guide.
Knot features
- Standalone USB MIDI Host, works with Grid and any MIDI class compliant USB controller
- TRS MIDI input port
- TRS MIDI output port
- USB-C port for charging, updating the device
- Hardware A/B switch for changing the TRS wiring mode
- Mode button for updating the firmware
- 3 indicator LEDs, which will be utilized for various feedback
USB MIDI Device compatibility with Knot as a host
If you own a device you couldn't find in the list below, help us out by submitting a test of your own to support@intech.studio!
| Manufacturer | Device name | Compatibility | Tester |
|---|---|---|---|
| Intech Studio | Grid | Tested - OK | Intech |
| M-AUDIO | MIDISPORT UNO | Tested - OK | Intech |
| Novation | Launchpad MK3 Mini | Tested - OK | Intech |
| Novation | Launchpad MK2 | Tested - OK | Intech |
| Novation | Launchkey 25 | Tested - Power OK, No MIDI | Intech |
| Korg | Electribe ES2 | Tested - OK | Intech |
| Livid Instruments | DS-1 | Tested - OK | Community |
| Midi Fighter | Midi Fighter Twister | Tested - OK | Community |
5-pin DIN/TRS MIDI Device compatibility
If you own a device you couldn't find in the list below, help us out by submitting a test of your own to support@intech.studio!
| Manufacturer | Device name | MIDI connector | Compatibility | Tester |
|---|---|---|---|---|
| 1010music | Blackbox | TRS type-B | Tested - OK | Community |
| 1010music | Bluebox | TRS type-B | Tested - OK | Community |
| Behringer | TD-3-AM | 5-pin DIN | Tested - OK | Intech |
| Behringer | U-PHORIA UMC404HD | 5-pin DIN | Tested - OK | Intech |
| Korg | Volca FM (other Volcas should perform similarly) | 5-pin DIN | Tested - OK | Intech |
| Korg | Electribe ES2 | TRS type-B | Tested - OK | Intech |
| Mutable Instruments | Yarns | 5-pin DIN | Tested - OK | Intech |
| Polyend | Tracker | TRS type-B | Tested - OK | Intech |
Parts
109| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 100n | suku_basics:CAP_0402 | C2, C3, C4, C5, C6, C7, C8, C10, C11, C12, C13, C14, C15, C25, C26 |
| 9 | 5k1 | suku_basics:RES_0402 | R1, R3, R5, R6, R9, R10, R15, R16, R17 |
| 6 | BL1551B | suku_basics:SOT-363_SC-70-6 | U2, U3, U4, U5, U10, U11 |
| 6 | G | TestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP6, TP9, TP13, TP18, TP21, TP25 |
| 5 | 1k | suku_basics:RES_0402 | R2, R4, R7, R8, R11 |
| 3 | 10u | suku_basics:CAP_0402 | C1, C19, C24 |
| 3 | 220R | suku_basics:RES_0402 | R12, R13, R14 |
| 3 | CS1E470M-CRE54 | Capacitor_SMD:CP_Elec_6.3x5.7 | C16, C17, C18 |
| 3 | SESRV05-4 | suku_basics:SOT-23-6 | U6, U7, U9 |
| 3 | UI_WS2812C-2020 | suku_basics:UI_WS2812C-2020_LIGHTPIPE | D1, D2, D3 |
| 2 | 10k | suku_basics:RES_0402 | R19, R20 |
| 2 | 3k3 | suku_basics:RES_0402 | R21, R22 |
| 2 | 5V | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP5, TP10 |
| 2 | 6N137 | suku_basics:OPTO_SMD-8_L9.8-W6.6-P2.54-LS10.3-BL | U12, U13 |
| 2 | B340LA-13-F | Diode_SMD:D_SMA | D4, D5 |
| 2 | D+ | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP12, TP15 |
| 2 | D- | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP11, TP14 |
| 2 | MPZ2012S101AT000 | suku_basics:FERRIT_0805 | FB1, FB2 |
| 2 | PJ-320B | suku_basics:AUDIO-SMD_PJ-320B | Audio1, Audio2 |
| 2 | R | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP17, TP20 |
| 2 | T | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP16, TP19 |
| 1 | (N.F.) | suku_basics:CP_EIA-6032-15_Kemet-U | C22 |
| 1 | (NF) | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | 100n (NF) | suku_basics:CAP_0402 | C9 |
| 1 | 10k (NF) | suku_basics:RES_0402 | R18 |
| 1 | 10n | suku_basics:CAP_0402 | C20 |
| 1 | 1u | suku_basics:CAP_0402 | C21 |
| 1 | 74HC165 | suku_basics:SOIC-16_74HC165 | U8 |
| 1 | 74HC1G14GV | suku_basics:SOT-23-5-AND-TSSOP5 | U14 |
| 1 | CA45-C6R3K337T | suku_basics:CP_EIA-6032-15_Kemet-U | C23 |
| 1 | DC-C033D-5.5A-2.5 | suku_basics:DC-IN-TH_DC-C033D-5.5A-2.5 | DC1 |
| 1 | DO | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP4 |
| 1 | ESP32-S3-WROOM-1U | suku_basics:ESP32-S3-WROOM-1U | U1 |
| 1 | GND | TestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP3 |
| 1 | LN1134A332MR-G | suku_basics:SOT-23-5 | U17 |
| 1 | MC-107DM | suku_basics:USB_C_Korean_Hroparts_TYPE-C-31-M-12 | J1 |
| 1 | OSHWA | suku_basics:OSHWA_KNOT | LOGO1 |
| 1 | PMIC_MT9700 | suku_basics:SOT-23-5 | U16 |
| 1 | ROM | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1 |
| 1 | RX | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP8 |
| 1 | SNR.8065.TYD220MT00 | Inductor_SMD:L_Bourns-SRU8028_8.0x8.0mm | L1 |
| 1 | ST-0-102-C03-N003-RS | suku_basics:SW-TH_ST-0-102-C03-N003-RS | SW2 |
| 1 | TC-1109DE-C-G | suku_basics:SW-TH_3P-L4.5-W7.0-P3.00-LS1.9 | SW1 |
| 1 | TPS5430DDA | Package_SO:TI_SO-PowerPAD-8_ThermalVias | U15 |
| 1 | TX | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP7 |
| 1 | UF2 | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP2 |
| 1 | USB-CON-AF-LCP-Offset | suku_basics:USB-A-SMD_AF-LCP-OFFSET | CN1 |
| 1 | V1 | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP22 |
| 1 | V2 | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP23 |
| 1 | VBUS | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP24 |
| 1 | WST2011 | suku_basics:SOT-23-6 | Q1 |
| 1 | WST3392 | suku_basics:SOT-23-6 | Q2 |
Questions
How big is the MIDI Host PCB?
It measures 56 × 60 mm and has 4 copper layers, 1 mm thick.
What parts does the MIDI Host use?
109 parts, built around the ESP32-S3-WROOM-1U-N4, TPS5430DDA, BL1551B and SESRV05-4. 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 MIDI Host KiCad files?
From the scorchio/knot repository on GitHub, at the commit this page was made from: the board is electrical/MIDI_Host/MIDI_Host.kicad_pcb and its schematic electrical/MIDI_Host/MIDI_Host.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MIDI Host design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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