4 layers55 × 33.1 mm
2 layers55 × 54.5 mm
Qcard multicart
partlyhuman/qchord8Hardware and Software for the Suzuki Q-Chord
- Size
- 55 × 54.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 46
- Pads
- 115
- Tracks, vias
- 269, 59
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 29 Dec 2022
- Updated
- 18 Oct 2026
Overview
Qcard multicart is an open-source printed circuit board by partlyhuman, from the partlyhuman/qchord repository on GitHub, published under the MIT licence. It is a 2-layer board of 55 × 54.5 mm with 14 parts on 46 nets, routed with 269 tracks and 59 vias.
It is built around the MX29LV640EBTI-70G and MIC5365-3.3YD5-TR. Its parts include 5 resistors, 3 capacitors, 2 ICs, 1 connector and 1 switch.
Main components
2
MX29LV640EBTI-70G
TSOPI-48-40℃~+85℃ 100,000 cycles 2.7V~3.6V 20 Years 500ms@(64KB) 5uA 64Mbit Parallel TSOPI-48 NOR FLASH ROHSMXICNOR FLASH
MIC5365-3.3YD5-TR
TSOT-23-5-40℃~+125℃@(Tj) 1 150mA 200uVrms 3.3V 310mV@(150mA) 39uA 5.5V 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive TSOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdSuzuki QChord Projects
Things that work with the Suzuki QChord, primarily a reproduction QCard that can be built with completely off-the-shelf parts. These projects are under active development.
Physical devices
Q-Card Multicart QMC-001
You can get one as long as stock lasts at my Ko-Fi shop!
A single cartridge that contains the entire Q-Card library, selectable by dip switches. The flash should be programmed prior to assembly, by concatenating the 4Mbit dumps you can find on archive.org.
Single Q-Card Reproduction
A rewriteable reproduction QCard PCB using SMD components. The flash module uses a TSOP32 package. It can be reprogrammed after assembly with the programmer adapter below.
Documentation
Including
- my research notes on the Q-Card hardware & connector
- my reverse-engineered Q-Card format
- continuing research into the sound bank present on Q-Chord
Software
Primarily, the qcard command-line tool that can be used to convert MIDI to and from Q-Cards.
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R4, R5 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | MountingHole_6.4mm_M6 | MountingHole:MountingHole_6.4mm_M6 | H1, H2 |
| 1 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 774-1954MST | Package_DIP:DIP-8_W7.62mm | SW1 |
| 1 | Conn_02x18_Top_Bottom | reb-edge:REB_EdgeConnector_36pin | J1 |
| 1 | MIC5365-3.3YD5 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | MX29LV640EBTI-70G | reb-flash:SOP50P2000X120-48N | U1 |
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Questions
How big is the Qcard multicart PCB?
It measures 55 × 54.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Qcard multicart use?
14 parts, built around the MX29LV640EBTI-70G and MIC5365-3.3YD5-TR. 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 Qcard multicart KiCad files?
From the partlyhuman/qchord repository on GitHub, at the commit this page was made from: the board is pcbs/qcard-multicart/qcard-multicart.kicad_pcb and its schematic pcbs/other/qcard-dumper-pcb/QCard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Qcard multicart 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).