ComposerMIDICV
About the ComposerMIDICV PCB
ComposerMIDICV is an open source Raspberry Pi PCB design by CopycatMusic, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 20 × 110 mm, with 86 components from 38 distinct parts.
Its main chip is the RP2354A, from the Raspberry Pi family. Other key parts include the ABM8-272-T3, TJ-L5FPTXHMCYLCRGB-A5, 78L05G-AB3-R, HT7533-1 and OPA4991IPWR. By type, the board carries 29 resistors, 28 capacitors, 11 ICs, 10 connectors, 4 switches and 2 diodes.
It belongs with the audio designs in this gallery.
From the project
4 HP Eurorack USB/TRS MIDI-to-CV module: RP2354A firmware, KiCad hardware and v1.0 manufacturing files.
A four-channel MIDI-to-CV/Gate Eurorack module, built around the RP2354A.
Composer connects a DAW or MIDI instrument to analog synthesizers through USB MIDI or a 3.5 mm TRS MIDI input. Four CV outputs and four Gate outputs provide pitch, velocity, modulation, random voltages and clock signals across six hardware-selected modes.
USER_MANUAL · Firmware guide ManufacturingGuide
Main components on the ComposerMIDICV
ComposerMIDICV bill of materials (BOM)
86 components, 38 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RP2354A | QFN-60-1EP_7x7mm_P0.4mm_EP3.4x3.4mm | U1 |
| 1 | ABM8-272-T3 ABM8-272-T3_C20625731 ABRACON | CRYSTAL-SMD_4P-L3.2-W2.5-BL | U2 |
| 1 | TJ-L5FPTXHMCYLCRGB-A5 TOGIALED(统佳) | LED-TH_4P-BD5.8-P1.30 | U3 |
| 1 | 78L05G-AB3-R UTC(友顺) | SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR | U4 |
| 1 | HT7533-1 HT7533-1_C14289 HOLTEK(合泰/盛群) | SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR | U5 |
| 1 | OPA4991IPWR TI(德州仪器) | TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL | U6 |
| 1 | 74AHCT244PW MDD(辰达半导体) | TSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL | U7 |
| 2 | MCP4822-E/SN MICROCHIP(美国微芯) | SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | U8, U9 |
| 1 | TYPE-C 14PLC-H10.0 SHOU HAN(首韩) | USB-C-TH_SHOUHAN_TYPE-C-14PLC-H10.0 | U10 |
| 1 | TLP2361(TPL,E TLP2361 TOSHIBA(东芝) | OPTO-SMD-5_L3.7-W4.6-P1.27-LS7.0-BR | U11 |
| 8 | AUDIOJACK2_SWITCHT AudioJack2_SwitchT | Jack_3.5mm_QingPu_WQP-PJ301M-12_Vertical | J1, J2, J3, J4, J5, J6, J7, J8 |
| 1 | AUDIOJACK3 AudioJack3 | Jack_3.5mm_QingPu_WQP-PJ366ST_Vertical | J9 |
| 1 | 2.54-2*5P简牛 HDR-IDC-2.54-2X5P BOOMELE(博穆精密) | IDC-TH_10P-P2.54_C5665 | P1 |
| 1 | PH2.54-01-04PZD XUNPU(讯普) | HDR-TH_4P-P2.54-V-M-1 | H1 |
| 2 | TS-1088-AR02016 XUNPU(讯普) | SW-SMD_L3.9-W3.0-P4.45 | SW1, SW2 |
| 1 | MT-0-102-A101-M200-RS MT-0-102-A101-M200-RS+PJ YUEN FUNG(源丰) | SW-TH_MT-0-103-A101-M200-RS | SW3 |
| 1 | MT-0-103-A101-M200-RS MT-0-103-A101-M200-RS+PJ YUEN FUNG(源丰) | SW-TH_MT-0-103-A101-M200-RS | SW4 |
| 1 | 1N5819WS Hottech(合科泰) | SOD-323_L1.8-W1.3-LS2.5-RD | D1 |
| 1 | 1N4148WS Changjiang Electronics Tech (CJ) | D_SOD-323 | D2 |
| 1 | AOTA-B201610S3R3-101-T 3.3uH | R_0805_2012Metric | L3 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1UF 1uF Samsung Electro-Mechanics | C_0805 | C1 |
| 12 | 100NF 100nF Samsung Electro-Mechanics | C_0402 | C2, C5, C6, C7, C8, C9, C10, C11 +4 |
| 2 | 15PF 15pF FH(Guangdong Fenghua Advanced Tech) | C_0402 | C3, C4 |
| 2 | 10UF 10uF Samsung Electro-Mechanics | C_0805 | C16, C21 |
| 1 | 4.7UF 4.7uF Samsung Electro-Mechanics | C_0402 | C17 |
| 5 | 100NF 100nF YAGEO | C_0603 | C18, C26, C29, C31, C33 |
| 1 | 4.7UF 4.7uF Samsung Electro-Mechanics | C_0805 | C19 |
| 1 | 100NF 100nF Samsung Electro-Mechanics | C_0805 | C20 |
| 2 | 10UF 10uF Samsung Electro-Mechanics | C_0603 | C27, C28 |
| 1 | 4.7UF 4.7uF Samsung Electro-Mechanics | C_0603 | C32 |
| 1 | 1kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R1 |
| 2 | 33Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R2, R3 |
| 1 | 470Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R4 |
| 2 | 5.1kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R5, R6 |
| 10 | 10kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R7, R21, R22, R23, R24, R25, R26, R27 +2 |
| 10 | 1kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R8, R9, R10, R11, R12, R13, R14, R15 +2 |
| 1 | 220Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R18 |
| 2 | 100kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R19, R20 |
ComposerMIDICV design files
The KiCad project lives in the CopycatMusic/ComposerMIDICV repository on GitHub; these links point at the commit this page was built from.
ComposerMIDICV: common questions
What microcontroller does the ComposerMIDICV use?
The ComposerMIDICV is built around the RP2354A, from the Raspberry Pi family.
How big is the ComposerMIDICV PCB?
The ComposerMIDICV measures 20 × 110 mm, has 2 copper layers and is 2.09 mm thick.
How many components are on the ComposerMIDICV?
86 components, from 38 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 ComposerMIDICV design files?
From the CopycatMusic/ComposerMIDICV repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the ComposerMIDICV design in my own project?
Yes, under the terms of its AGPL-3.0 license, which CopycatMusic chose for the repository.
Can I test firmware for the ComposerMIDICV without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.
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