2 layers30 × 82.3 mm
MiniVCF v1.0 - Main
benjiaomodular/MiniVCF
A 4HP diode ladder low-pass filter for Eurorack modular synthesizer
46 parts10
2 layers94 × 128.5 mm
MiniVCF
benjiaomodular/MiniVCF10A 4HP diode ladder low-pass filter for Eurorack modular synthesizer
- Size
- 94 × 128.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 86
- Nets
- 55
- Pads
- 230
- Tracks, vias
- 340, 186
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 23 Jan 2022
- Updated
- 13 Mar 2022
Overview
MiniVCF is an open-source printed circuit board by benjiaomodular, from the benjiaomodular/MiniVCF repository on GitHub. It is a 2-layer board of 94 × 128.5 mm with 86 parts on 55 nets, routed with 340 tracks and 186 vias.
Its parts include 23 resistors, 16 diodes, 14 capacitors, 12 connectors and 2 ICs. It belongs with the audio and music boards of this library.
README
README.mdMiniVCF
This is a diode-ladder voltage controlled low pass filter based on Moritz Klein's diode ladder tutorial series.
More info on my website: https://benjiaomodular.com/post/2022-03-11-mini-vcf/
Versions
v1.1 - Quick fixes (Unverified)
- Fixed orientation of Cutoff and Post-LPF knobs.
- Updated toggle switch footprint to a bit more space.
- Swapped clipping LED positions. Positive clipping now at the top row.
- Added missing labels for OpAmps, adjusted some unreadable labels.
v1.0 - Initial release
This is the first release of the module. I got it to work, but has a couple of issues.
Issues Encountered
- Cutoff and Post-LPF knobs are wired the opposite way.
- Holes for the toggle switch a bit too tight.
Parts
86| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 8 | 33k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R4, R5, R6, R7, R8, R9, R10 |
| 4 | 100nF | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C10, C11, C12, C13 |
| 4 | 1nF | benjiaomodular:Capacitor_Rect_L7.2mm_W2.5mm_P5.00mm | C3, C4, C5, C6 |
| 4 | LED | LED_THT:LED_D5.0mm | D12, D13, D14, D15 |
| 3 | 100k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13, R14, R22 |
| 3 | 10k | benjiaomodular:Potentiometer_RV09 | CV_AMT1, CV_AMT2, POST_LPF1 |
| 2 | 100k | benjiaomodular:Potentiometer_RV09 | CUTOFF1, RESO2 |
| 2 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C8, C9 |
| 2 | 10k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R15, R23 |
| 2 | 1uF | benjiaomodular:Capacitor_Radial_D5.0mm_P2.5mm | C1, C7 |
| 2 | 200k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R20 |
| 2 | 2k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R11, R12 |
| 2 | TL074 | Package_DIP:DIP-14_W7.62mm_Socket | U1, U2 |
| 1 | 100nF | benjiaomodular:Capacitor_Rect_L7.2mm_W2.5mm_P5.00mm | C14 |
| 1 | 10k-20k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R18 |
| 1 | 1k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R17 |
| 1 | 2.7k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R16 |
| 1 | 200r | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21 |
| 1 | 330 | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 47k | benjiaomodular:Resistor_L6.3mm_D2.5mm_P7.62mm_Horizontal | R19 |
| 1 | 680pF | benjiaomodular:Capacitor_Rect_L7.2mm_W2.5mm_P5.00mm | C2 |
| 1 | AudioIn | benjiaomodular:AudioJack_3.5mm | J3 |
| 1 | AudioOut | benjiaomodular:AudioJack_3.5mm | J5 |
| 1 | CONN_PWR1 | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J6 |
| 1 | CONN_PWR2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | CTRL_PANEL_CONN | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Vertical | J9 |
| 1 | CTRL_PANEL_CONN2 | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J11 |
| 1 | CV1 | benjiaomodular:AudioJack_3.5mm | J4 |
| 1 | CV2 | benjiaomodular:AudioJack_3.5mm | J10 |
| 1 | IDC_BUS | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J2 |
| 1 | JST_BUS | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J1 |
| 1 | LED | LED_THT:LED_D3.0mm | D16 |
| 1 | MAIN_BOARD_CONN | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J8 |
| 1 | MAIN_BOARD_CONN2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J12 |
| 1 | SW_DPDT_x2 | benjiaomodular:ToggleSwitch_MTS-202_DPDT | LP_BP_SWITCH1 |
The 73 most common of 86 parts.
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Questions
How big is the MiniVCF PCB?
It measures 94 × 128.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MiniVCF use?
86 parts. 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 MiniVCF KiCad files?
From the benjiaomodular/MiniVCF repository on GitHub, at the commit this page was made from: the board is KiCAD/MiniVCF 1.0/MiniVCF.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the MiniVCF design in my own project?
Its repository states no licence, so its author keeps all rights: ask benjiaomodular before reusing the design.