2 layers126.2 × 100 mm
Quantizer pcb
QuinnFreedman/modular
A collection of free & open source DIY synthesizer module designs for Eurorack
110 parts116
2 layers165 × 103.8 mm
Output pcb
QuinnFreedman/modular116A collection of free & open source DIY synthesizer module designs for Eurorack
- Size
- 165 × 103.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 128
- Nets
- 120
- Pads
- 428
- Tracks, vias
- 1,097, 7
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Dec 2019
- Updated
- 3 Nov 2026
Overview
Output pcb is an open-source printed circuit board by QuinnFreedman, from the QuinnFreedman/modular repository on GitHub. It is a 2-layer board of 165 × 103.8 mm with 128 parts on 120 nets, routed with 1,097 tracks and 7 vias.
It is built around the NE5532, TL072 and ACJS-MV-3. Its parts include 48 resistors, 34 capacitors, 13 connectors, 12 ICs and 12 diodes. It belongs with the audio and music boards of this library.
Main components
3
NE5532
SOP-8-22V~22V 0℃~+70℃ 100dB 10nA 14mA 2 40V/us 42mA 4mV 800nA 8nV/√Hz@30Hz Built-in compensation SOP-8 Operational Amplifier ROHSSungineOperational AmplifierTL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational AmplifierACJS-MV-3
--25℃~+70℃ Copper - Audio Connectors ROHSAmphenolAudio Connectors (Headphones)
README
README.mdThis project is an attempt to make Eurorack modular synthesis affordable and accessible to everyone.
This repository contains open source software and hardware schematics for Eurorack modules which are designed to be assembled easily and cheaply without any technical knowledge. Every module should be able to be assembled for around $20 in about an hour of work, even with limited experience.
To get started, check out some of the links below. Or get in touch! Send me a message at freemodular@gmail.com. Follow my reddit, Etsy shop, or GitHub.
Happy travels on your modular journey!
Links
Modules
{% include_relative docs/modules.md %}
Parts
128| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25 +8 |
| 22 | 10kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R12, R13, R14, R21, R22, R23, R24, R25, R26, R39, R40, R41, R42, R43, R44 +6 |
| 8 | 10Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R8, R9, R10, R15, R16, R17, R18 |
| 6 | GREEN | LED_THT:LED_D3.0mm | D5, D6, D7, D10, D11, D12 |
| 6 | NE5532 | Package_DIP:DIP-8_W7.62mm | U3, U4, U5, U6, U8, U9 |
| 5 | TL074 | Package_DIP:DIP-14_W7.62mm | U2, U7, U10, U11, U12 |
| 4 | 100pF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C29, C30, C33, C34 |
| 4 | 100Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R27, R28, R29, R30 |
| 4 | 10uF | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C3, C4, C31, C32 |
| 4 | 20kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R11, R19, R20 |
| 4 | Conn_01x10_Pin | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J11, J13, J21, J23 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5 | H1, H2, H3, H4 |
| 3 | ACJS-MV-3 | FreeModualr:Jack_6.35mm_ACJS-MV | J3, J4, J5 |
| 3 | Board | kikit:Board | B1, B2, B3 |
| 2 | 100kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 2 | 150nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
| 2 | 1N4148 | Diode_THT:D_A-405_P7.62mm_Horizontal | D1, D2 |
| 2 | 22kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R31, R32 |
| 2 | 50kΩB | Potentiometer_THT:Potentiometer_Alpha_RD902F-40-00D_Dual_Vertical | RV1, RV2 |
| 2 | AMBER | LED_THT:LED_D3.0mm | D4, D9 |
| 2 | Conn_01x10_Socket | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J12, J22 |
| 2 | RED | LED_THT:LED_D3.0mm | D3, D8 |
| 2 | THONKICONN | FreeModualr:THONKICONN | J1, J2 |
| 1 | 1.5kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R35 |
| 1 | 2.2kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R34 |
| 1 | 2.4kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R36 |
| 1 | 33kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R33 |
| 1 | 470Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R38 |
| 1 | 820Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R37 |
| 1 | Conn_01x03_Socket | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | Eurorack_2x5_Power | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J6 |
| 1 | TL072 | Package_DIP:DIP-8_W7.62mm | U1 |
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Questions
How big is the Output pcb PCB?
It measures 165 × 103.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Output pcb use?
128 parts, built around the NE5532, TL072 and ACJS-MV-3. 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 Output pcb KiCad files?
From the QuinnFreedman/modular repository on GitHub, at the commit this page was made from: the board is modules/Output/PCBs/output_pcb/output_pcb.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Output pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask QuinnFreedman before reusing the design.