2 layers28.6 × 99.7 mm
Main pcb
Testbild-synth/HAGIWO-040-VCS-Eurorack
Through-hole PCB version of the HAGIWO "Select" voltage controlled Switch Eurorack module
49 parts15MIT
2 layers18.5 × 99 mm
Circuit pcb
Testbild-synth/HAGIWO_045_Distortion17Through-hole 4HP PCB version of the HAGIWO distortion eurorack module
- Size
- 18.5 × 99 mm
- Copper layers
- 2
- Parts
- 25
- Nets
- 23
- Pads
- 77
- Tracks, vias
- 160, 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 16 Mar 2022
- Updated
- 4 Dec 2022
Overview
Circuit pcb is an open-source printed circuit board by Testbild-synth, from the Testbild-synth/HAGIWO_045_Distortion repository on GitHub, published under the MIT licence. It is a 2-layer board of 18.5 × 99 mm with 25 parts on 23 nets, routed with 160 tracks and 3 vias.
It is built around the TL072BCP. Its parts include 9 capacitors, 7 resistors, 2 diodes, 2 connectors and 1 IC.
Main components
1README
README.mdHAGIWO Diode Distortion Eurorack Module
Through-hole 4HP PCB version of the HAGIWO distortion eurorack module.
Current Status: Confirmed working.
Hardware and PCB
You can find the schematic and BOM in the root folder. For the PCBs, the module has one circuit PCB and one panel PCB. You can order them on any common PCB manufacturing service, I used JLCPCB. For the circuit PCB, standard settings should be fine. For the panel, since it has copper exposed, make sure to choose a lead free surface finish (LeadFree HASL, ENIG) and/or spraypaint your panels so that you don't get lead on your hands.
Build is super straight forward, but the 250K Pots specified by HAGIWO can be hard to source. I just used 1M instead, which probably changes how gain and distortion behave, but it still works so you can try that instead if you have a hard time sourcing 250k.
Ideas
One Idea (that I did not try yet but definitely want to) is to exchange the 1n4148 diodes for header sockets or something so you can put in LEDs. Different color LEDs will produce different sound!
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1u | easyeda:RAD-0.1 | C2, C5, C7 |
| 3 | 4k7 | easyeda:R_AXIAL-0.3 | R1, R3, R4 |
| 2 | 100n | easyeda:RAD-0.1 | C8, C9 |
| 2 | 100p | easyeda:RAD-0.1 | C1, C6 |
| 2 | 10k | easyeda:R_AXIAL-0.3 | R2, R5 |
| 2 | 10u | easyeda:CAP-D4.0×F1.5 | C3, C4 |
| 2 | 1n4148 | easyeda:DO35-7 | D1, D2 |
| 2 | 250k | easyeda:R09-5KΩ | DIST, GAIN |
| 1 | 10k | easyeda:R09-5KΩ | ATT |
| 1 | 1M | easyeda:R_AXIAL-0.3 | R14 |
| 1 | 1k | easyeda:R_AXIAL-0.3 | R6 |
| 1 | EURORACK_POWERHEADER_V2 | easyeda:EURORACK_POWER_V2 | EP1 |
| 1 | IN | easyeda:THONKICONN_1 | J1 |
| 1 | OUT | easyeda:THONKICONN_1 | J2 |
| 1 | TL072BCP | easyeda:DIP8 | U1 |
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Questions
How big is the Circuit pcb PCB?
It measures 18.5 × 99 mm and has 2 copper layers.
What parts does the Circuit pcb use?
25 parts, built around the TL072BCP. 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 Circuit pcb KiCad files?
From the Testbild-synth/HAGIWO_045_Distortion repository on GitHub, at the commit this page was made from: the board is design files/pcb/circuit_pcb.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Circuit pcb 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).