PerfDAC buffers
svgeesus·EuroMPE·Duophonic/KiCad/PerfDAC_buffers/PerfDAC_buffers.kicad_pcb
About the PerfDAC buffers PCB
PerfDAC buffers is an open source PCB design by svgeesus, published on GitHub under the MIT license. It is a 2-layer board measuring 46.5 × 23.4 mm, with 33 components from 8 distinct parts.
Other key parts include the OPA4340UA. By type, the board carries 16 resistors, 10 capacitors, 4 connectors and 2 ICs.
It belongs with the audio designs in this gallery.
From the project
Eurorack MPE implementation, 2 to 8 voices
Inspired by the use of duophony on the ARP 2600 and Odyssey, this is a MIDI to CV Eurorack module with twin outputs: low-note priority and high-note priority.
Re-utilising designs from the polyphonic Euro-MPE project, this aims to be a high-precison, flexible, and performance oriented duophonic MIDI to Eurorack CV module. It's MPE compatible, so there is independent expression on each of the two notes.

Main components on the PerfDAC buffers
PerfDAC buffers bill of materials (BOM)
33 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | OPA4340UA | SOIC-14_3.9x8.7mm_P1.27mm | U1, U2 |
| 2 | Conn_01x06_Pin | PinHeader_1x06_P2.54mm_Vertical | J1, J2 |
| 2 | Conn_01x05_Socket | PinSocket_1x05_P2.54mm_Vertical | J3, J4 |
| 1 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | PWR1 |
| 8 | 100pF | C_0805_2012Metric | C5, C7, C8, C9, C10, C11, C12, C13 |
| 2 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C6, C14 |
| 8 | 47R | R_0805_2012Metric | R3, R6, R9, R10, R15, R16, R17, R18 |
| 8 | 4k7 | R_0805_2012Metric | R4, R5, R7, R8, R11, R12, R13, R14 |
PerfDAC buffers design files
The KiCad project lives in the svgeesus/EuroMPE repository on GitHub; these links point at the commit this page was built from.
PerfDAC buffers: common questions
How big is the PerfDAC buffers PCB?
The PerfDAC buffers measures 46.5 × 23.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the PerfDAC buffers?
33 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the PerfDAC buffers design files?
From the svgeesus/EuroMPE repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the PerfDAC buffers design in my own project?
Yes, under the terms of its MIT license, which svgeesus chose for the repository.
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