4 layers81.3 × 108 mm
Myriad 0.5
Emute-Lab-Instruments/Myriad
Sources for Emute Lab Instruments Myriad eurorack module
185 parts2MIT
4 layers81.3 × 108 mm
Myriad 0.4
Emute-Lab-Instruments/Myriad2Sources for Emute Lab Instruments Myriad eurorack module
- Size
- 81.3 × 108 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 185
- Nets
- 184
- Pads
- 597
- Tracks, vias
- 1,448, 179
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 5 Oct 2024
- Updated
- 6 Jul 2026
Overview
Myriad 0.4 is an open-source printed circuit board by Emute-Lab-Instruments, from the Emute-Lab-Instruments/Myriad repository on GitHub, published under the MIT licence. It is a 4-layer board of 81.3 × 108 mm with 185 parts on 184 nets, routed with 1,448 tracks and 179 vias.
It is built around the LM13700M, MMBT3906 and MMBT3904, with the PEC11R-4215F-S0024, 1N4148WS and TS-1187A-B-A-B among its other parts. Its parts include 98 resistors, 35 capacitors, 12 ICs, 9 transistors and 7 connectors.
Main components
6
LM13700M
SOIC-16-16V~-4.75V、4.75V~16V 0℃~+70℃ 110dB 2 2.6mA 20mA 400nA 4mV 50V/us 600nA 9.5V~32V SOIC-16 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
MMBT3906
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200mA 200mW 300MHz 300mV 40V 5V PNP SOT-23 Bipolar (BJT) ROHSTWGMCBipolar (BJT)MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
PEC11R-4215F-S0024
插件-30℃~+70℃ 10mA 24/24 5V Incremental Straight Two-phase output 插件 Rotary Encoders ROHSBournsRotary Encoders
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
TS-1187A-B-A-B
SMD-4P,5.1x5.1mm-30℃~+85℃ 1.5mm 1.6N 100,000 cycles 12V 5.1mm 5.1mm 50mA Gold No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,5.1x5.1mm Tactile Switches ROHSXKB ConnectionTactile Switches
README
readme.mdSources for Emute Lab Instruments Myriad eurorack module
Architecture
There are two ELI2040 modules, linked by serial. Module A (on the left when the module is facing down) handles IO and display on core 0 and synthesis on core 1. Module B handles synthesis on both cores.
Developer Notes
This compiles using Arduino enviroment, with the Earle Philhower Arduino Pico Core.
Settings:
There are two sketches, Myriad_A and Myriad_B
There are shared files between the two sketches. In the Arduino system, these files need to be in the libraries folder, so create a symbolic link from the Arduino/libraries folder to arduino_libmyriad in this folder.
On unix:
ln -s [path to this repo]/arduino_libmyriad/ You need to install the Emute Lab Instruments fork of TFT_eSPI library, and configure to use the following driver in Arduino/libraries/TFT_eSPT/User_Setup_Select.h by making this edit:
//#include <User_Setup.h> // Default setup is root library folder
#include <User_Setups/Setup303_RP2040_GC9A01.h> //for myriad round TFTParts
185| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 100k | Resistor_SMD:R_0402_1005Metric | R34, R35, R36, R37, R38, R39, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49 |
| 16 | 100n | Capacitor_SMD:C_0603_1608Metric | C4, C5, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C36, C37 |
| 14 | 10k | Resistor_SMD:R_0603_1608Metric | R25, R26, R61, R70, R72, R73, R74, R75, R79, R80, R81, R82, R90, R91 |
| 12 | 33k | Resistor_SMD:R_0603_1608Metric | R8, R10, R11, R12, R15, R16, R17, R18, R19, R20, R21, R22 |
| 7 | 1k | Resistor_SMD:R_0603_1608Metric | R14, R31, R32, R33, R88, R95, R96 |
| 6 | 100k 0603 | Resistor_SMD:R_0603_1608Metric | R28, R29, R56, R65, R93, R94 |
| 6 | 4.7n C0G | Capacitor_SMD:C_0805_2012Metric | C24, C25, C26, C28, C29, C30 |
| 6 | TL074 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U4, U8, U10, U11, U12, U13 |
| 5 | 100k | Eurocad:Alpha9mmPot | RV-CV1, RV-CV2, RV-CV3, RV-CV4, RV4_VCA_Shape1 |
| 5 | MMBT3906 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q4, Q6, Q8 |
| 4 | 1.2k | Resistor_SMD:R_0603_1608Metric | R54, R55, R63, R64 |
| 4 | 150n | Capacitor_THT:C_Rect_L7.0mm_W4.5mm_P5.00mm | C27, C31, C32, C34 |
| 4 | 1nF | Capacitor_SMD:C_0402_1005Metric | C20, C21, C22, C23 |
| 4 | 330 | Resistor_SMD:R_0603_1608Metric | R57, R59, R66, R68 |
| 4 | 33k_0402 | Resistor_SMD:R_0402_1005Metric | R50, R51, R52, R53 |
| 4 | 47k | Resistor_SMD:R_0603_1608Metric | R27, R30, R87, R92 |
| 4 | 5.1k 1% | Resistor_SMD:R_0402_1005Metric | R2, R3, R6, R7 |
| 4 | 68k | Resistor_SMD:R_0603_1608Metric | R23, R24, R86, R89 |
| 4 | LED | emutelab:LED_D3.0mm_Clear_Annotated | D2, D3, D4, D5 |
| 4 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q3, Q5, Q7, Q9 |
| 3 | 470p | Capacitor_SMD:C_0603_1608Metric | C2, C33, C35 |
| 3 | PEC11R-4215F-S0024 | digikey-footprints:Rotary_Encoder_Switched_PEC11R | S1, S2, S3 |
| 2 | 0R0 | Resistor_SMD:R_0603_1608Metric | R97, R98 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C3 |
| 2 | 20k | Resistor_SMD:R_0603_1608Metric | R62, R71 |
| 2 | 2k | Resistor_SMD:R_0603_1608Metric | R77, R84 |
| 2 | 3.3k | Resistor_SMD:R_0603_1608Metric | R58, R67 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R60, R69 |
| 2 | 7.5k | Resistor_SMD:R_0603_1608Metric | R76, R83 |
| 2 | CJ431 SOT-23 | Package_TO_SOT_SMD:SOT-23 | U2, U3 |
| 2 | DNP | Resistor_SMD:R_0603_1608Metric | R78, R85 |
| 2 | ELI2040B 1 | Connector_PinSocket_2.54mm:PinSocket_1x35_P2.54mm_Vertical | J2, J3 |
| 2 | MCP6002-xMS | Package_SO:MSOP-8_3x3mm_P0.65mm | U7, U9 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H1, H2 |
| 1 | -5V Ref | TestPoint:TestPoint_Pad_1.0x1.0mm | TP2 |
| 1 | 1.8, >24mW | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 1N4148WS | Diode_SMD:D_SOD-323 | D1 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 470k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 5V reference | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1 |
| 1 | 6.8k | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | B100k | Potentiometer_THT:Potentiometer_Alpha_RD902F-40-00D_Dual_Vertical_CircularHoles | RV1 |
| 1 | CV In 1 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | CV In 2 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J6 |
| 1 | CV In 3 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | CV In 4 | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J7 |
| 1 | CV Shape | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J1 |
| 1 | CVIn | TestPoint:TestPoint_Pad_1.0x1.0mm | TP3 |
| 1 | LM13700 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U5 |
| 1 | Out L | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J_Out_L1 |
| 1 | Out R | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J_Out_R1 |
| 1 | Shape Out R | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J_Out_R2 |
| 1 | Shape out L | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J_Out_L2 |
| 1 | TS-1187A-B-A-B | emutelab:SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL-2 | SW1 |
| 1 | ~ | emutelab:Round TFT 240x240 | U1 |
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Questions
How big is the Myriad 0.4 PCB?
It measures 81.3 × 108 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Myriad 0.4 use?
185 parts, built around the LM13700M, MMBT3906, MMBT3904 and PEC11R-4215F-S0024. 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 Myriad 0.4 KiCad files?
From the Emute-Lab-Instruments/Myriad repository on GitHub, at the commit this page was made from: the board is hardware/myriad_0.4/myriad_0.4.kicad_pcb and its schematic hardware/myriad/myriad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Myriad 0.4 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).